21477372343231 has 8 divisors (see below), whose sum is σ = 24566893830144. Its totient is φ = 18393182215800.

The previous prime is 21477372343201. The next prime is 21477372343247. The reversal of 21477372343231 is 13234327377412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21477372343231 - 2⁵ = 21477372343199 is a prime.

It is a super-2 number, since 2×21477372343231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21477372343201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1332831235 + ... + 1332847348.

It is an arithmetic number, because the mean of its divisors is an integer number (3070861728768).

Almost surely, 2^{21477372343231} is an apocalyptic number.

21477372343231 is a deficient number, since it is larger than the sum of its proper divisors (3089521486913).

21477372343231 is a wasteful number, since it uses less digits than its factorization.

21477372343231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665679741.

The product of its digits is 3556224, while the sum is 49.

The spelling of 21477372343231 in words is "twenty-one trillion, four hundred seventy-seven billion, three hundred seventy-two million, three hundred forty-three thousand, two hundred thirty-one".