20632885 has 32 divisors (see below), whose sum is σ = 30788352. Its totient is φ = 12925440.

The previous prime is 20632877. The next prime is 20632889. The reversal of 20632885 is 58823602.

It is not a de Polignac number, because 20632885 - 2³ = 20632877 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 20632885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20632889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62170 + ... + 62500.

It is an arithmetic number, because the mean of its divisors is an integer number (962136).

Almost surely, 2^20632885 is an apocalyptic number.

It is an amenable number.

20632885 is a deficient number, since it is larger than the sum of its proper divisors (10155467).

20632885 is a wasteful number, since it uses less digits than its factorization.

20632885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 20632885 is about 4542.3435581206. The cubic root of 20632885 is about 274.2752708051.

The spelling of 20632885 in words is "twenty million, six hundred thirty-two thousand, eight hundred eighty-five".