20901512 has 16 divisors (see below), whose sum is σ = 39398400. Its totient is φ = 10395280.

The previous prime is 20901509. The next prime is 20901581. The reversal of 20901512 is 21510902.

It is a super-2 number, since 2×20901512² = 873746407772288, which contains 22 as substring.

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, 5312 + ... + 8367.

It is an arithmetic number, because the mean of its divisors is an integer number (2462400).

Almost surely, 2^20901512 is an apocalyptic number.

It is an amenable number.

20901512 is a deficient number, since it is larger than the sum of its proper divisors (18496888).

20901512 is a wasteful number, since it uses less digits than its factorization.

20901512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13876 (or 13872 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 20901512 is about 4571.8171441999. The cubic root of 20901512 is about 275.4604385647.

The spelling of 20901512 in words is "twenty million, nine hundred one thousand, five hundred twelve".