21060317375508 has 24 divisors (see below), whose sum is σ = 49141977000480. Its totient is φ = 7019929155040.

The previous prime is 21060317375501. The next prime is 21060317375521. The reversal of 21060317375508 is 80557371306012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21060317375501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21582363 + ... + 22537058.

It is an arithmetic number, because the mean of its divisors is an integer number (2047582375020).

Almost surely, 2^{21060317375508} is an apocalyptic number.

It is an amenable number.

21060317375508 is an abundant number, since it is smaller than the sum of its proper divisors (28081659624972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21060317375508 is a wasteful number, since it uses less digits than its factorization.

21060317375508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44159207 (or 44159205 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 48.

The spelling of 21060317375508 in words is "twenty-one trillion, sixty billion, three hundred seventeen million, three hundred seventy-five thousand, five hundred eight".