20755872 has 48 divisors (see below), whose sum is σ = 60540480. Its totient is φ = 6918336.

The previous prime is 20755841. The next prime is 20755877. The reversal of 20755872 is 27855702.

20755872 is a `hidden beast` number, since 2 + 0 + 75 + 587 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20755877) 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, 11148 + ... + 12875.

It is an arithmetic number, because the mean of its divisors is an integer number (1261260).

Almost surely, 2^20755872 is an apocalyptic number.

It is an amenable number.

20755872 is an abundant number, since it is smaller than the sum of its proper divisors (39784608).

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

20755872 is a wasteful number, since it uses less digits than its factorization.

20755872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24042 (or 24028 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 20755872 is about 4555.8612797143. The cubic root of 20755872 is about 274.8191516181.

The spelling of 20755872 in words is "twenty million, seven hundred fifty-five thousand, eight hundred seventy-two".