21365564152454 has 16 divisors (see below), whose sum is σ = 32350619455488. Its totient is φ = 10582284355272.

The previous prime is 21365564152453. The next prime is 21365564152459. The reversal of 21365564152454 is 45425146556312.

It is a happy number.

It is a super-2 number, since 2×21365564152454² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21365564152396 and 21365564152405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21365564152453) 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, 64840604 + ... + 65169279.

It is an arithmetic number, because the mean of its divisors is an integer number (2021913715968).

Almost surely, 2^{21365564152454} is an apocalyptic number.

21365564152454 is a deficient number, since it is larger than the sum of its proper divisors (10985055303034).

21365564152454 is a wasteful number, since it uses less digits than its factorization.

21365564152454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130010659.

The product of its digits is 17280000, while the sum is 53.

The spelling of 21365564152454 in words is "twenty-one trillion, three hundred sixty-five billion, five hundred sixty-four million, one hundred fifty-two thousand, four hundred fifty-four".