20039916 has 24 divisors (see below), whose sum is σ = 50357104. Its totient is φ = 6166080.

The previous prime is 20039893. The next prime is 20039933. The reversal of 20039916 is 61993002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64075 + ... + 64386.

Almost surely, 2^20039916 is an apocalyptic number.

20039916 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20039916 is an abundant number, since it is smaller than the sum of its proper divisors (30317188).

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

20039916 is a wasteful number, since it uses less digits than its factorization.

20039916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128481 (or 128479 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 20039916 is about 4476.5964750020. The cubic root of 20039916 is about 271.6222228139.

The spelling of 20039916 in words is "twenty million, thirty-nine thousand, nine hundred sixteen".