21473654885 has 8 divisors (see below), whose sum is σ = 25939038336. Its totient is φ = 17065155600.

The previous prime is 21473654863. The next prime is 21473654893. The reversal of 21473654885 is 58845637412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21473654885 - 2²⁸ = 21205219429 is a prime.

It is a super-2 number, since 2×21473654885² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14220209 + ... + 14221718.

It is an arithmetic number, because the mean of its divisors is an integer number (3242379792).

Almost surely, 2^21473654885 is an apocalyptic number.

It is an amenable number.

21473654885 is a deficient number, since it is larger than the sum of its proper divisors (4465383451).

21473654885 is a wasteful number, since it uses less digits than its factorization.

21473654885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28442083.

The product of its digits is 6451200, while the sum is 53.

The spelling of 21473654885 in words is "twenty-one billion, four hundred seventy-three million, six hundred fifty-four thousand, eight hundred eighty-five".