20951924 has 12 divisors (see below), whose sum is σ = 41903904. Its totient is φ = 8979384.

The previous prime is 20951923. The next prime is 20951947. The reversal of 20951924 is 42915902.

20951924 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20951921) 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, 374114 + ... + 374169.

It is an arithmetic number, because the mean of its divisors is an integer number (3491992).

Almost surely, 2^20951924 is an apocalyptic number.

It is an amenable number.

20951924 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20951924 is a wasteful number, since it uses less digits than its factorization.

20951924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748294 (or 748292 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 20951924 is about 4577.3271676820. The cubic root of 20951924 is about 275.6817202013.

The spelling of 20951924 in words is "twenty million, nine hundred fifty-one thousand, nine hundred twenty-four".