20277968 has 20 divisors (see below), whose sum is σ = 40556928. Its totient is φ = 9811680.

The previous prime is 20277953. The next prime is 20278001. The reversal of 20277968 is 86977202.

20277968 is an admirable number.

It is a super-2 number, since 2×20277968² = 822391972418048, which contains 22 as substring.

It is a congruent number.

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, 19946 + ... + 20937.

Almost surely, 2^20277968 is an apocalyptic number.

It is an amenable number.

20277968 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20277968 is a wasteful number, since it uses less digits than its factorization.

20277968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40922 (or 40916 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 20277968 is about 4503.1064833068. The cubic root of 20277968 is about 272.6935157141.

The spelling of 20277968 in words is "twenty million, two hundred seventy-seven thousand, nine hundred sixty-eight".