20972512 has 24 divisors (see below), whose sum is σ = 45043992. Its totient is φ = 9532800.

The previous prime is 20972473. The next prime is 20972513. The reversal of 20972512 is 21527902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20972513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29439 + ... + 30142.

It is an arithmetic number, because the mean of its divisors is an integer number (1876833).

Almost surely, 2^20972512 is an apocalyptic number.

20972512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20972512 is an abundant number, since it is smaller than the sum of its proper divisors (24071480).

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

20972512 is a wasteful number, since it uses less digits than its factorization.

20972512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59602 (or 59594 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 20972512 is about 4579.5755261814. The cubic root of 20972512 is about 275.7719883985.

The spelling of 20972512 in words is "twenty million, nine hundred seventy-two thousand, five hundred twelve".