21314367631 has 4 divisors (see below), whose sum is σ = 21614570064. Its totient is φ = 21014165200.

The previous prime is 21314367629. The next prime is 21314367677. The reversal of 21314367631 is 13676341312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21314367631 - 2¹ = 21314367629 is a prime.

It is a super-2 number, since 2×21314367631² (a number of 21 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 (21314367611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150101110 + ... + 150101251.

It is an arithmetic number, because the mean of its divisors is an integer number (5403642516).

Almost surely, 2^21314367631 is an apocalyptic number.

21314367631 is a deficient number, since it is larger than the sum of its proper divisors (300202433).

21314367631 is an equidigital number, since it uses as much as digits as its factorization.

21314367631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300202432.

The product of its digits is 54432, while the sum is 37.

The spelling of 21314367631 in words is "twenty-one billion, three hundred fourteen million, three hundred sixty-seven thousand, six hundred thirty-one".