21454554554435 has 32 divisors (see below), whose sum is σ = 27007789495680. Its totient is φ = 16338904243200.

The previous prime is 21454554554393. The next prime is 21454554554453. The reversal of 21454554554435 is 53445545545412.

It is not a de Polignac number, because 21454554554435 - 2⁸ = 21454554554179 is a prime.

It is a super-2 number, since 2×21454554554435² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29179625 + ... + 29905845.

It is an arithmetic number, because the mean of its divisors is an integer number (843993421740).

Almost surely, 2^{21454554554435} is an apocalyptic number.

21454554554435 is a deficient number, since it is larger than the sum of its proper divisors (5553234941245).

21454554554435 is a wasteful number, since it uses less digits than its factorization.

21454554554435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729119.

The product of its digits is 96000000, while the sum is 56.

The spelling of 21454554554435 in words is "twenty-one trillion, four hundred fifty-four billion, five hundred fifty-four million, five hundred fifty-four thousand, four hundred thirty-five".