21070453176 has 48 divisors (see below), whose sum is σ = 57075464160. Its totient is φ = 7022296320.

The previous prime is 21070453169. The next prime is 21070453181. The reversal of 21070453176 is 67135407012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 21070453176.

It is a congruent number.

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, 472816 + ... + 515456.

It is an arithmetic number, because the mean of its divisors is an integer number (1189072170).

Almost surely, 2^21070453176 is an apocalyptic number.

It is an amenable number.

21070453176 is an abundant number, since it is smaller than the sum of its proper divisors (36005010984).

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

21070453176 is a wasteful number, since it uses less digits than its factorization.

21070453176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49516 (or 49509 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 21070453176 in words is "twenty-one billion, seventy million, four hundred fifty-three thousand, one hundred seventy-six".