20914972 has 24 divisors (see below), whose sum is σ = 41493200. Its totient is φ = 9144576.

The previous prime is 20914951. The next prime is 20914997. The reversal of 20914972 is 27941902.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 9597 + ... + 11572.

Almost surely, 2^20914972 is an apocalyptic number.

It is an amenable number.

20914972 is a deficient number, since it is larger than the sum of its proper divisors (20578228).

20914972 is a wasteful number, since it uses less digits than its factorization.

20914972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21205 (or 21203 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 20914972 is about 4573.2889696585. The cubic root of 20914972 is about 275.5195555303.

The spelling of 20914972 in words is "twenty million, nine hundred fourteen thousand, nine hundred seventy-two".