16802421320 has 16 divisors (see below), whose sum is σ = 37805448060. Its totient is φ = 6720968512.

The previous prime is 16802421319. The next prime is 16802421341. The reversal of 16802421320 is 2312420861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14530373764 + 2272047556 = 120542^2 + 47666^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210030227 + ... + 210030306.

Almost surely, 2^16802421320 is an apocalyptic number.

16802421320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16802421320 is an abundant number, since it is smaller than the sum of its proper divisors (21003026740).

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

16802421320 is a wasteful number, since it uses less digits than its factorization.

16802421320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420060544 (or 420060540 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 16802421320 in words is "sixteen billion, eight hundred two million, four hundred twenty-one thousand, three hundred twenty".