21312631363 has 8 divisors (see below), whose sum is σ = 21355779600. Its totient is φ = 21269511648.

The previous prime is 21312631321. The next prime is 21312631411. The reversal of 21312631363 is 36313621312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21312631363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21312631063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2072328 + ... + 2082586.

It is an arithmetic number, because the mean of its divisors is an integer number (2669472450).

Almost surely, 2^21312631363 is an apocalyptic number.

21312631363 is a deficient number, since it is larger than the sum of its proper divisors (43148237).

21312631363 is a wasteful number, since it uses less digits than its factorization.

21312631363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14261.

The product of its digits is 11664, while the sum is 31.

The spelling of 21312631363 in words is "twenty-one billion, three hundred twelve million, six hundred thirty-one thousand, three hundred sixty-three".