21630863106 has 16 divisors (see below), whose sum is σ = 48068584800. Its totient is φ = 7210287684.

The previous prime is 21630863083. The next prime is 21630863113. The reversal of 21630863106 is 60136803612.

21630863106 is a `hidden beast` number, since 2 + 1 + 630 + 8 + 6 + 3 + 10 + 6 = 666.

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 7 ways as a sum of consecutive naturals, for example, 200285716 + ... + 200285823.

It is an arithmetic number, because the mean of its divisors is an integer number (3004286550).

Almost surely, 2^21630863106 is an apocalyptic number.

21630863106 is an abundant number, since it is smaller than the sum of its proper divisors (26437721694).

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

21630863106 is a wasteful number, since it uses less digits than its factorization.

21630863106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400571550 (or 400571544 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

It can be divided in two parts, 21630 and 863106, that added together give a cube (884736 = 96³).

The spelling of 21630863106 in words is "twenty-one billion, six hundred thirty million, eight hundred sixty-three thousand, one hundred six".