21316062631 has 16 divisors (see below), whose sum is σ = 21659478624. Its totient is φ = 20975560704.

The previous prime is 21316062611. The next prime is 21316062643. The reversal of 21316062631 is 13626061312.

It is a cyclic number.

It is not a de Polignac number, because 21316062631 - 2⁷ = 21316062503 is a prime.

It is a super-2 number, since 2×21316062631² (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 = 21316062593 and 21316062602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21316062611) 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 15 ways as a sum of consecutive naturals, for example, 22366851 + ... + 22367803.

It is an arithmetic number, because the mean of its divisors is an integer number (1353717414).

Almost surely, 2^21316062631 is an apocalyptic number.

21316062631 is a deficient number, since it is larger than the sum of its proper divisors (343415993).

21316062631 is an equidigital number, since it uses as much as digits as its factorization.

21316062631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 21316062631 in words is "twenty-one billion, three hundred sixteen million, sixty-two thousand, six hundred thirty-one".