21574854455 has 64 divisors (see below), whose sum is σ = 32723481600. Its totient is φ = 13264542720.

The previous prime is 21574854449. The next prime is 21574854463. The reversal of 21574854455 is 55445847512.

It is not a de Polignac number, because 21574854455 - 2⁶ = 21574854391 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25115816 + ... + 25116674.

It is an arithmetic number, because the mean of its divisors is an integer number (511304400).

Almost surely, 2^21574854455 is an apocalyptic number.

21574854455 is a deficient number, since it is larger than the sum of its proper divisors (11148627145).

21574854455 is a wasteful number, since it uses less digits than its factorization.

21574854455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704.

The product of its digits is 4480000, while the sum is 50.

The spelling of 21574854455 in words is "twenty-one billion, five hundred seventy-four million, eight hundred fifty-four thousand, four hundred fifty-five".