20831336 has 16 divisors (see below), whose sum is σ = 39234240. Its totient is φ = 10368880.

The previous prime is 20831323. The next prime is 20831533. The reversal of 20831336 is 63313802.

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, 3920 + ... + 7551.

It is an arithmetic number, because the mean of its divisors is an integer number (2452140).

Almost surely, 2^20831336 is an apocalyptic number.

It is an amenable number.

20831336 is a deficient number, since it is larger than the sum of its proper divisors (18402904).

20831336 is a wasteful number, since it uses less digits than its factorization.

20831336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11704 (or 11700 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20831336 is about 4564.1358437277. The cubic root of 20831336 is about 275.1518103944.

The spelling of 20831336 in words is "twenty million, eight hundred thirty-one thousand, three hundred thirty-six".