16820461338 has 32 divisors (see below), whose sum is σ = 35115724800. Its totient is φ = 5361188976.

The previous prime is 16820461319. The next prime is 16820461349. The reversal of 16820461338 is 83316402861.

It is a self number, because there is not a number n which added to its sum of digits gives 16820461338.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410883 + ... + 449961.

It is an arithmetic number, because the mean of its divisors is an integer number (1097366400).

Almost surely, 2^16820461338 is an apocalyptic number.

16820461338 is an abundant number, since it is smaller than the sum of its proper divisors (18295263462).

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

16820461338 is a wasteful number, since it uses less digits than its factorization.

16820461338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42226.

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 16820461338 in words is "sixteen billion, eight hundred twenty million, four hundred sixty-one thousand, three hundred thirty-eight".