21312631362 has 64 divisors (see below), whose sum is σ = 46894598784. Its totient is φ = 6403837440.

The previous prime is 21312631321. The next prime is 21312631411. The reversal of 21312631362 is 26313621312.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4067008 + ... + 4072244.

It is an arithmetic number, because the mean of its divisors is an integer number (732728106).

Almost surely, 2^21312631362 is an apocalyptic number.

21312631362 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21312631362 is an abundant number, since it is smaller than the sum of its proper divisors (25581967422).

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

21312631362 is a wasteful number, since it uses less digits than its factorization.

21312631362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5763.

The product of its digits is 7776, while the sum is 30.

The spelling of 21312631362 in words is "twenty-one billion, three hundred twelve million, six hundred thirty-one thousand, three hundred sixty-two".