20631952 has 30 divisors (see below), whose sum is σ = 43942934. Its totient is φ = 9377280.

The previous prime is 20631937. The next prime is 20631953. The reversal of 20631952 is 25913602.

It can be written as a sum of positive squares in only one way, i.e., 12702096 + 7929856 = 3564^2 + 2816^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20631952.

It is not an unprimeable number, because it can be changed into a prime (20631953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3393 + ... + 7264.

Almost surely, 2^20631952 is an apocalyptic number.

20631952 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20631952 is an abundant number, since it is smaller than the sum of its proper divisors (23310982).

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

20631952 is a wasteful number, since it uses less digits than its factorization.

20631952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10687 (or 10670 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 20631952 is about 4542.2408566698. The cubic root of 20631952 is about 274.2711365847.

The spelling of 20631952 in words is "twenty million, six hundred thirty-one thousand, nine hundred fifty-two".