21313652431 has 8 divisors (see below), whose sum is σ = 21474512640. Its totient is φ = 21152899992.

The previous prime is 21313652429. The next prime is 21313652441. The reversal of 21313652431 is 13425631312.

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 21313652431 - 2¹ = 21313652429 is a prime.

It is a super-2 number, since 2×21313652431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21313652393 and 21313652402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313652441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394836 + ... + 445558.

It is an arithmetic number, because the mean of its divisors is an integer number (2684314080).

Almost surely, 2^21313652431 is an apocalyptic number.

21313652431 is a deficient number, since it is larger than the sum of its proper divisors (160860209).

21313652431 is a wasteful number, since it uses less digits than its factorization.

21313652431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53885.

The product of its digits is 12960, while the sum is 31.

The spelling of 21313652431 in words is "twenty-one billion, three hundred thirteen million, six hundred fifty-two thousand, four hundred thirty-one".