21327505570 has 16 divisors (see below), whose sum is σ = 43873725888. Its totient is φ = 7312287600.

The previous prime is 21327505547. The next prime is 21327505631. The reversal of 21327505570 is 7550572312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152339256 + ... + 152339395.

It is an arithmetic number, because the mean of its divisors is an integer number (2742107868).

Almost surely, 2^21327505570 is an apocalyptic number.

21327505570 is an abundant number, since it is smaller than the sum of its proper divisors (22546220318).

21327505570 is a wasteful number, since it uses less digits than its factorization.

21327505570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304678665.

The product of its (nonzero) digits is 73500, while the sum is 37.

The spelling of 21327505570 in words is "twenty-one billion, three hundred twenty-seven million, five hundred five thousand, five hundred seventy".