20923944 has 32 divisors (see below), whose sum is σ = 53725920. Its totient is φ = 6785856.

The previous prime is 20923943. The next prime is 20923949. The reversal of 20923944 is 44932902.

It is a super-2 number, since 2×20923944² = 875622865030272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20923943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10894 + ... + 12669.

It is an arithmetic number, because the mean of its divisors is an integer number (1678935).

Almost surely, 2^20923944 is an apocalyptic number.

20923944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20923944 is an abundant number, since it is smaller than the sum of its proper divisors (32801976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20923944 is a wasteful number, since it uses less digits than its factorization.

20923944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23609 (or 23605 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 20923944 is about 4574.2697777897. The cubic root of 20923944 is about 275.5589468982.

The spelling of 20923944 in words is "twenty million, nine hundred twenty-three thousand, nine hundred forty-four".