21412836531 has 6 divisors (see below), whose sum is σ = 30929652780. Its totient is φ = 14275224348.

The previous prime is 21412836521. The next prime is 21412836559. The reversal of 21412836531 is 13563821412.

21412836531 is a `hidden beast` number, since 2 + 1 + 41 + 2 + 83 + 6 + 531 = 666.

It is not a de Polignac number, because 21412836531 - 2¹⁴ = 21412820147 is a prime.

It is a super-2 number, since 2×21412836531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21412836521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1189602021 + ... + 1189602038.

It is an arithmetic number, because the mean of its divisors is an integer number (5154942130).

Almost surely, 2^21412836531 is an apocalyptic number.

21412836531 is a deficient number, since it is larger than the sum of its proper divisors (9516816249).

21412836531 is a wasteful number, since it uses less digits than its factorization.

21412836531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379204065 (or 2379204062 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The spelling of 21412836531 in words is "twenty-one billion, four hundred twelve million, eight hundred thirty-six thousand, five hundred thirty-one".