20978596 has 12 divisors (see below), whose sum is σ = 36747648. Its totient is φ = 10479272.

The previous prime is 20978569. The next prime is 20978611. The reversal of 20978596 is 69587902.

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, 4185 + ... + 7711.

It is an arithmetic number, because the mean of its divisors is an integer number (3062304).

Almost surely, 2^20978596 is an apocalyptic number.

It is an amenable number.

20978596 is a deficient number, since it is larger than the sum of its proper divisors (15769052).

20978596 is a wasteful number, since it uses less digits than its factorization.

20978596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5018 (or 5016 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 20978596 is about 4580.2397317171. The cubic root of 20978596 is about 275.7986524205.

The spelling of 20978596 in words is "twenty million, nine hundred seventy-eight thousand, five hundred ninety-six".