20631248 has 20 divisors (see below), whose sum is σ = 43607328. Its totient is φ = 9377760.

The previous prime is 20631229. The next prime is 20631263. The reversal of 20631248 is 84213602.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58436 + ... + 58787.

Almost surely, 2^20631248 is an apocalyptic number.

It is an amenable number.

20631248 is an abundant number, since it is smaller than the sum of its proper divisors (22976080).

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

20631248 is a wasteful number, since it uses less digits than its factorization.

20631248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117242 (or 117236 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20631248 is about 4542.1633612190. The cubic root of 20631248 is about 274.2680170047.

The spelling of 20631248 in words is "twenty million, six hundred thirty-one thousand, two hundred forty-eight".