20507924 has 12 divisors (see below), whose sum is σ = 36394848. Its totient is φ = 10109400.

The previous prime is 20507911. The next prime is 20507969. The reversal of 20507924 is 42970502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35822 + ... + 36389.

It is an arithmetic number, because the mean of its divisors is an integer number (3032904).

Almost surely, 2^20507924 is an apocalyptic number.

It is an amenable number.

20507924 is a deficient number, since it is larger than the sum of its proper divisors (15886924).

20507924 is a wasteful number, since it uses less digits than its factorization.

20507924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72286 (or 72284 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20507924 is about 4528.5675439370. The cubic root of 20507924 is about 273.7204423095.

The spelling of 20507924 in words is "twenty million, five hundred seven thousand, nine hundred twenty-four".