21463564031 has 48 divisors (see below), whose sum is σ = 27320366304. Its totient is φ = 16711059456.

The previous prime is 21463564009. The next prime is 21463564033. The reversal of 21463564031 is 13046536412.

It is not a de Polignac number, because 21463564031 - 2²⁶ = 21396455167 is a prime.

It is a super-2 number, since 2×21463564031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21463563982 and 21463564000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21463564033) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16547975 + ... + 16549271.

It is an arithmetic number, because the mean of its divisors is an integer number (569174298).

Almost surely, 2^21463564031 is an apocalyptic number.

21463564031 is a deficient number, since it is larger than the sum of its proper divisors (5856802273).

21463564031 is a wasteful number, since it uses less digits than its factorization.

21463564031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720 (or 1713 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 21463564031 in words is "twenty-one billion, four hundred sixty-three million, five hundred sixty-four thousand, thirty-one".