20264720 has 40 divisors (see below), whose sum is σ = 53847744. Its totient is φ = 6947712.

The previous prime is 20264719. The next prime is 20264737. The reversal of 20264720 is 2746202.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17534 + ... + 18653.

Almost surely, 2^20264720 is an apocalyptic number.

20264720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20264720 is an abundant number, since it is smaller than the sum of its proper divisors (33583024).

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

20264720 is a wasteful number, since it uses less digits than its factorization.

20264720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36207 (or 36201 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20264720 is about 4501.6352584366. The cubic root of 20264720 is about 272.6341174102.

The spelling of 20264720 in words is "twenty million, two hundred sixty-four thousand, seven hundred twenty".