20557692 has 48 divisors (see below), whose sum is σ = 56437920. Its totient is φ = 6448896.

The previous prime is 20557673. The next prime is 20557697. The reversal of 20557692 is 29675502.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20557697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3763 + ... + 7434.

It is an arithmetic number, because the mean of its divisors is an integer number (1175790).

Almost surely, 2^20557692 is an apocalyptic number.

It is an amenable number.

20557692 is an abundant number, since it is smaller than the sum of its proper divisors (35880228).

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

20557692 is a wasteful number, since it uses less digits than its factorization.

20557692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11227 (or 11219 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 20557692 is about 4534.0591085693. The cubic root of 20557692 is about 273.9416822269.

The spelling of 20557692 in words is "twenty million, five hundred fifty-seven thousand, six hundred ninety-two".