20831248 has 20 divisors (see below), whose sum is σ = 41046480. Its totient is φ = 10238624.

The previous prime is 20831219. The next prime is 20831249. The reversal of 20831248 is 84213802.

It is not an unprimeable number, because it can be changed into a prime (20831249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10090 + ... + 11977.

It is an arithmetic number, because the mean of its divisors is an integer number (2052324).

Almost surely, 2^20831248 is an apocalyptic number.

It is an amenable number.

20831248 is a deficient number, since it is larger than the sum of its proper divisors (20215232).

20831248 is a wasteful number, since it uses less digits than its factorization.

20831248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22134 (or 22128 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 20831248 is about 4564.1262033384. The cubic root of 20831248 is about 275.1514229429.

The spelling of 20831248 in words is "twenty million, eight hundred thirty-one thousand, two hundred forty-eight".