21324312364631 has 8 divisors (see below), whose sum is σ = 21455301485184. Its totient is φ = 21193325258040.

The previous prime is 21324312364613. The next prime is 21324312364633. The reversal of 21324312364631 is 13646321342312.

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

It is a cyclic number.

It is not a de Polignac number, because 21324312364631 - 2¹⁸ = 21324312102487 is a prime.

It is a super-2 number, since 2×21324312364631² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324312364633) 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, 24556400 + ... + 25409946.

It is an arithmetic number, because the mean of its divisors is an integer number (2681912685648).

Almost surely, 2^{21324312364631} is an apocalyptic number.

21324312364631 is a deficient number, since it is larger than the sum of its proper divisors (130989120553).

21324312364631 is a wasteful number, since it uses less digits than its factorization.

21324312364631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006981.

The product of its digits is 373248, while the sum is 41.

The spelling of 21324312364631 in words is "twenty-one trillion, three hundred twenty-four billion, three hundred twelve million, three hundred sixty-four thousand, six hundred thirty-one".