21373524063 has 6 divisors (see below), whose sum is σ = 30872868104. Its totient is φ = 14249016036.

The previous prime is 21373524049. The next prime is 21373524071. The reversal of 21373524063 is 36042537312.

21373524063 is a `hidden beast` number, since 2 + 1 + 3 + 73 + 524 + 0 + 63 = 666.

It is not a de Polignac number, because 21373524063 - 2⁵ = 21373524031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21373524013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1187417995 + ... + 1187418012.

Almost surely, 2^21373524063 is an apocalyptic number.

21373524063 is a deficient number, since it is larger than the sum of its proper divisors (9499344041).

21373524063 is a wasteful number, since it uses less digits than its factorization.

21373524063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374836013 (or 2374836010 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

It can be divided in two parts, 2137352 and 4063, that added together give a triangular number (2141415 = T₂₀₆₉).

The spelling of 21373524063 in words is "twenty-one billion, three hundred seventy-three million, five hundred twenty-four thousand, sixty-three".