20631028 has 12 divisors (see below), whose sum is σ = 39386592. Its totient is φ = 9377720.

The previous prime is 20631019. The next prime is 20631031. The reversal of 20631028 is 82013602.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 234400 + ... + 234487.

It is an arithmetic number, because the mean of its divisors is an integer number (3282216).

Almost surely, 2^20631028 is an apocalyptic number.

It is an amenable number.

20631028 is a deficient number, since it is larger than the sum of its proper divisors (18755564).

20631028 is a wasteful number, since it uses less digits than its factorization.

20631028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468902 (or 468900 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20631028 is about 4542.1391436194. The cubic root of 20631028 is about 274.2670421214.

The spelling of 20631028 in words is "twenty million, six hundred thirty-one thousand, twenty-eight".