21674627464431 has 64 divisors (see below), whose sum is σ = 32882868864000. Its totient is φ = 12617266636800.

The previous prime is 21674627464429. The next prime is 21674627464433. The reversal of 21674627464431 is 13446472647612.

It is an interprime number because it is at equal distance from previous prime (21674627464429) and next prime (21674627464433).

It is not a de Polignac number, because 21674627464431 - 2¹ = 21674627464429 is a prime.

It is a super-2 number, since 2×21674627464431² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21674627464433) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9193861 + ... + 11308241.

It is an arithmetic number, because the mean of its divisors is an integer number (513794826000).

Almost surely, 2^{21674627464431} is an apocalyptic number.

21674627464431 is a deficient number, since it is larger than the sum of its proper divisors (11208241399569).

21674627464431 is a wasteful number, since it uses less digits than its factorization.

21674627464431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114640.

The product of its digits is 32514048, while the sum is 57.

The spelling of 21674627464431 in words is "twenty-one trillion, six hundred seventy-four billion, six hundred twenty-seven million, four hundred sixty-four thousand, four hundred thirty-one".