21170583834270 has 96 divisors (see below), whose sum is σ = 56793253607424. Its totient is φ = 5043116707200.

The previous prime is 21170583834221. The next prime is 21170583834277. The reversal of 21170583834270 is 7243838507112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21170583834277) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67192146 + ... + 67506485.

It is an arithmetic number, because the mean of its divisors is an integer number (591596391744).

Almost surely, 2^{21170583834270} is an apocalyptic number.

21170583834270 is an abundant number, since it is smaller than the sum of its proper divisors (35622669773154).

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

21170583834270 is a wasteful number, since it uses less digits than its factorization.

21170583834270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134698698 (or 134698685 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 21170583834270 in words is "twenty-one trillion, one hundred seventy billion, five hundred eighty-three million, eight hundred thirty-four thousand, two hundred seventy".