21054876475 has 12 divisors (see below), whose sum is σ = 26109857880. Its totient is φ = 16842732800.

The previous prime is 21054876457. The next prime is 21054876481. The reversal of 21054876475 is 57467845012.

It is not a de Polignac number, because 21054876475 - 2¹⁷ = 21054745403 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 630960 + ... + 663490.

It is an arithmetic number, because the mean of its divisors is an integer number (2175821490).

Almost surely, 2^21054876475 is an apocalyptic number.

21054876475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21054876475 is a deficient number, since it is larger than the sum of its proper divisors (5054981405).

21054876475 is a wasteful number, since it uses less digits than its factorization.

21054876475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58430 (or 58425 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 49.

The spelling of 21054876475 in words is "twenty-one billion, fifty-four million, eight hundred seventy-six thousand, four hundred seventy-five".