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20244043231 = 74112731621
BaseRepresentation
bin10010110110101000…
…111001010111011111
31221020211201221121221
4102312220321113133
5312424433340411
613144444034211
71314444346126
oct226650712737
957224657557
1020244043231
118649264345
123b0b832967
131ba8112c09
14da0890abd
157d73c5071
hex4b6a395df

20244043231 has 4 divisors (see below), whose sum is σ = 20246782264. Its totient is φ = 20241304200.

The previous prime is 20244043223. The next prime is 20244043247. The reversal of 20244043231 is 13234044202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13234044202 = 26617022101.

It is a cyclic number.

It is not a de Polignac number, because 20244043231 - 23 = 20244043223 is a prime.

It is a super-2 number, since 2×202440432312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20244043196 and 20244043205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20244043201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1358400 + ... + 1373221.

It is an arithmetic number, because the mean of its divisors is an integer number (5061695566).

Almost surely, 220244043231 is an apocalyptic number.

20244043231 is a deficient number, since it is larger than the sum of its proper divisors (2739033).

20244043231 is an equidigital number, since it uses as much as digits as its factorization.

20244043231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739032.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20244043231 its reverse (13234044202), we get a palindrome (33478087433).

The spelling of 20244043231 in words is "twenty billion, two hundred forty-four million, forty-three thousand, two hundred thirty-one".

Divisors: 1 7411 2731621 20244043231