20241643 has 4 divisors (see below), whose sum is σ = 20303128. Its totient is φ = 20180160.

The previous prime is 20241619. The next prime is 20241653. The reversal of 20241643 is 34614202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20241643 - 2⁹ = 20241131 is a prime.

It is a super-2 number, since 2×20241643² = 819448222678898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20241653) 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, 30246 + ... + 30907.

It is an arithmetic number, because the mean of its divisors is an integer number (5075782).

Almost surely, 2^20241643 is an apocalyptic number.

20241643 is a deficient number, since it is larger than the sum of its proper divisors (61485).

20241643 is an equidigital number, since it uses as much as digits as its factorization.

20241643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61484.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20241643 is about 4499.0713486230. The cubic root of 20241643 is about 272.5305882674.

Adding to 20241643 its reverse (34614202), we get a palindrome (54855845).

The spelling of 20241643 in words is "twenty million, two hundred forty-one thousand, six hundred forty-three".