21477434264631 has 12 divisors (see below), whose sum is σ = 32092717867080. Its totient is φ = 13824555388560.

The previous prime is 21477434264623. The next prime is 21477434264731. The reversal of 21477434264631 is 13646243477412.

It is a happy number.

21477434264631 is a `hidden beast` number, since 2 + 1 + 477 + 43 + 42 + 64 + 6 + 31 = 666.

It is not a de Polignac number, because 21477434264631 - 2³ = 21477434264623 is a prime.

It is a super-2 number, since 2×21477434264631² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21477434264131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41144509825 + ... + 41144510346.

It is an arithmetic number, because the mean of its divisors is an integer number (2674393155590).

Almost surely, 2^{21477434264631} is an apocalyptic number.

21477434264631 is a deficient number, since it is larger than the sum of its proper divisors (10615283602449).

21477434264631 is a wasteful number, since it uses less digits than its factorization.

21477434264631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82289020206 (or 82289020203 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 54.

The spelling of 21477434264631 in words is "twenty-one trillion, four hundred seventy-seven billion, four hundred thirty-four million, two hundred sixty-four thousand, six hundred thirty-one".