20901572 has 12 divisors (see below), whose sum is σ = 38168256. Its totient is φ = 9996360.

The previous prime is 20901509. The next prime is 20901581. The reversal of 20901572 is 27510902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113504 + ... + 113687.

It is an arithmetic number, because the mean of its divisors is an integer number (3180688).

Almost surely, 2^20901572 is an apocalyptic number.

It is an amenable number.

20901572 is a deficient number, since it is larger than the sum of its proper divisors (17266684).

20901572 is a wasteful number, since it uses less digits than its factorization.

20901572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227218 (or 227216 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 20901572 is about 4571.8237061374. The cubic root of 20901572 is about 275.4607021438.

The spelling of 20901572 in words is "twenty million, nine hundred one thousand, five hundred seventy-two".