16821415194 has 32 divisors (see below), whose sum is σ = 35118088704. Its totient is φ = 5361436080.

The previous prime is 16821415189. The next prime is 16821415213. The reversal of 16821415194 is 49151412861.

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, 395277 + ... + 435759.

It is an arithmetic number, because the mean of its divisors is an integer number (1097440272).

Almost surely, 2^16821415194 is an apocalyptic number.

16821415194 is an abundant number, since it is smaller than the sum of its proper divisors (18296673510).

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

16821415194 is a wasteful number, since it uses less digits than its factorization.

16821415194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43522.

The product of its digits is 69120, while the sum is 42.

The spelling of 16821415194 in words is "sixteen billion, eight hundred twenty-one million, four hundred fifteen thousand, one hundred ninety-four".