21373627105631 has 2 divisors, whose sum is σ = 21373627105632. Its totient is φ = 21373627105630.

The previous prime is 21373627105603. The next prime is 21373627105637. The reversal of 21373627105631 is 13650172637312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21373627105631 - 2¹⁰ = 21373627104607 is a prime.

It is a super-2 number, since 2×21373627105631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21373627105637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10686813552815 + 10686813552816.

It is an arithmetic number, because the mean of its divisors is an integer number (10686813552816).

Almost surely, 2^{21373627105631} is an apocalyptic number.

21373627105631 is a deficient number, since it is larger than the sum of its proper divisors (1).

21373627105631 is an equidigital number, since it uses as much as digits as its factorization.

21373627105631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 952560, while the sum is 47.

The spelling of 21373627105631 in words is "twenty-one trillion, three hundred seventy-three billion, six hundred twenty-seven million, one hundred five thousand, six hundred thirty-one".