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20283423847 = 199101926753
BaseRepresentation
bin10010111000111111…
…000111110001100111
31221100120211200200021
4102320333013301213
5313020024030342
613152412100011
71315433154331
oct227077076147
957316750607
1020283423847
118669511605
123b20a64607
131bb332085b
14da5bc2451
157daaa3567
hex4b8fc7c67

20283423847 has 4 divisors (see below), whose sum is σ = 20385350800. Its totient is φ = 20181496896.

The previous prime is 20283423821. The next prime is 20283423859. The reversal of 20283423847 is 74832438202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20283423847 is a prime.

It is a super-2 number, since 2×202834238472 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20283423817) 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, 50963178 + ... + 50963575.

It is an arithmetic number, because the mean of its divisors is an integer number (5096337700).

Almost surely, 220283423847 is an apocalyptic number.

20283423847 is a deficient number, since it is larger than the sum of its proper divisors (101926953).

20283423847 is a wasteful number, since it uses less digits than its factorization.

20283423847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101926952.

The product of its (nonzero) digits is 516096, while the sum is 43.

The spelling of 20283423847 in words is "twenty billion, two hundred eighty-three million, four hundred twenty-three thousand, eight hundred forty-seven".

Divisors: 1 199 101926753 20283423847