20438976 has 28 divisors (see below), whose sum is σ = 54078632. Its totient is φ = 6812928.

The previous prime is 20438933. The next prime is 20438989. The reversal of 20438976 is 67983402.

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, 53035 + ... + 53418.

Almost surely, 2^20438976 is an apocalyptic number.

It is an amenable number.

20438976 is an abundant number, since it is smaller than the sum of its proper divisors (33639656).

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

20438976 is a wasteful number, since it uses less digits than its factorization.

20438976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106468 (or 106458 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 20438976 is about 4520.9485730320. The cubic root of 20438976 is about 273.4133469235.

The spelling of 20438976 in words is "twenty million, four hundred thirty-eight thousand, nine hundred seventy-six".