16396886920 has 32 divisors (see below), whose sum is σ = 39063173400. Its totient is φ = 6172945408.

The previous prime is 16396886837. The next prime is 16396886923. The reversal of 16396886920 is 2968869361.

It can be written as a sum of positive squares in 4 ways, for example, as 12099560004 + 4297326916 = 109998^2 + 65554^2 .

It is not an unprimeable number, because it can be changed into a prime (16396886923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12055855 + ... + 12057214.

Almost surely, 2^16396886920 is an apocalyptic number.

16396886920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16396886920 is an abundant number, since it is smaller than the sum of its proper divisors (22666286480).

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

16396886920 is a wasteful number, since it uses less digits than its factorization.

16396886920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24113097 (or 24113093 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 16396886920 in words is "sixteen billion, three hundred ninety-six million, eight hundred eighty-six thousand, nine hundred twenty".