20631076 has 12 divisors (see below), whose sum is σ = 36146572. Its totient is φ = 10303488.

The previous prime is 20631043. The next prime is 20631097. The reversal of 20631076 is 67013602.

It can be written as a sum of positive squares in 2 ways, for example, as 14745600 + 5885476 = 3840^2 + 2426^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20631076.

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, 1636 + ... + 6628.

Almost surely, 2^20631076 is an apocalyptic number.

It is an amenable number.

20631076 is a deficient number, since it is larger than the sum of its proper divisors (15515496).

20631076 is a wasteful number, since it uses less digits than its factorization.

20631076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6030 (or 6028 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 20631076 is about 4542.1444274704. The cubic root of 20631076 is about 274.2672548238.

Adding to 20631076 its reverse (67013602), we get a palindrome (87644678).

The spelling of 20631076 in words is "twenty million, six hundred thirty-one thousand, seventy-six".