21472658055 has 24 divisors (see below), whose sum is σ = 38011177152. Its totient is φ = 11208421824.

The previous prime is 21472658003. The next prime is 21472658057. The reversal of 21472658055 is 55085627412.

21472658055 is a `hidden beast` number, since 2 + 1 + 47 + 26 + 580 + 5 + 5 = 666.

It is not a de Polignac number, because 21472658055 - 2²⁰ = 21471609479 is a prime.

It is a super-2 number, since 2×21472658055² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 21472658055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21472658057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5074164 + ... + 5078393.

It is an arithmetic number, because the mean of its divisors is an integer number (1583799048).

Almost surely, 2^21472658055 is an apocalyptic number.

21472658055 is a deficient number, since it is larger than the sum of its proper divisors (16538519097).

21472658055 is a wasteful number, since it uses less digits than its factorization.

21472658055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10152615 (or 10152612 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The spelling of 21472658055 in words is "twenty-one billion, four hundred seventy-two million, six hundred fifty-eight thousand, fifty-five".