21467274021631 has 2 divisors, whose sum is σ = 21467274021632. Its totient is φ = 21467274021630.

The previous prime is 21467274021577. The next prime is 21467274021637. The reversal of 21467274021631 is 13612047276412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21467274021631 - 2¹³ = 21467274013439 is a prime.

It is a super-2 number, since 2×21467274021631² (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 (21467274021637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10733637010815 + 10733637010816.

It is an arithmetic number, because the mean of its divisors is an integer number (10733637010816).

Almost surely, 2^{21467274021631} is an apocalyptic number.

21467274021631 is a deficient number, since it is larger than the sum of its proper divisors (1).

21467274021631 is an equidigital number, since it uses as much as digits as its factorization.

21467274021631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 21467274021631 in words is "twenty-one trillion, four hundred sixty-seven billion, two hundred seventy-four million, twenty-one thousand, six hundred thirty-one".