20900512 has 24 divisors (see below), whose sum is σ = 41410656. Its totient is φ = 10383552.

The previous prime is 20900489. The next prime is 20900527. The reversal of 20900512 is 21500902.

It is a self number, because there is not a number n which added to its sum of digits gives 20900512.

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 3 ways as a sum of consecutive naturals, for example, 3213 + ... + 7219.

It is an arithmetic number, because the mean of its divisors is an integer number (1725444).

Almost surely, 2^20900512 is an apocalyptic number.

It is an amenable number.

20900512 is a deficient number, since it is larger than the sum of its proper divisors (20510144).

20900512 is a wasteful number, since it uses less digits than its factorization.

20900512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4180 (or 4172 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20900512 is about 4571.7077771879. The cubic root of 20900512 is about 275.4560455040.

It can be divided in two parts, 20900 and 512, that added together give a palindrome (21412).

The spelling of 20900512 in words is "twenty million, nine hundred thousand, five hundred twelve".