21057473370 has 16 divisors (see below), whose sum is σ = 50537936160. Its totient is φ = 5615326224.

The previous prime is 21057473329. The next prime is 21057473389. The reversal of 21057473370 is 7337475012.

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, 350957860 + ... + 350957919.

It is an arithmetic number, because the mean of its divisors is an integer number (3158621010).

Almost surely, 2^21057473370 is an apocalyptic number.

21057473370 is an abundant number, since it is smaller than the sum of its proper divisors (29480462790).

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

21057473370 is a wasteful number, since it uses less digits than its factorization.

21057473370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701915789.

The product of its (nonzero) digits is 123480, while the sum is 39.

The spelling of 21057473370 in words is "twenty-one billion, fifty-seven million, four hundred seventy-three thousand, three hundred seventy".