20572685 has 32 divisors (see below), whose sum is σ = 29663232. Its totient is φ = 13400640.

The previous prime is 20572663. The next prime is 20572691. The reversal of 20572685 is 58627502.

It is not a de Polignac number, because 20572685 - 2⁸ = 20572429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72554 + ... + 72836.

It is an arithmetic number, because the mean of its divisors is an integer number (926976).

Almost surely, 2^20572685 is an apocalyptic number.

It is an amenable number.

20572685 is a deficient number, since it is larger than the sum of its proper divisors (9090547).

20572685 is a wasteful number, since it uses less digits than its factorization.

20572685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 20572685 is about 4535.7121822267. The cubic root of 20572685 is about 274.0082624890.

The spelling of 20572685 in words is "twenty million, five hundred seventy-two thousand, six hundred eighty-five".