16890685394 has 32 divisors (see below), whose sum is σ = 28116239616. Its totient is φ = 7545629520.

The previous prime is 16890685373. The next prime is 16890685423. The reversal of 16890685394 is 49358609861.

It is a Curzon number.

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, 640049 + ... + 665915.

It is an arithmetic number, because the mean of its divisors is an integer number (878632488).

Almost surely, 2^16890685394 is an apocalyptic number.

16890685394 is a deficient number, since it is larger than the sum of its proper divisors (11225554222).

16890685394 is a wasteful number, since it uses less digits than its factorization.

16890685394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26390.

The product of its (nonzero) digits is 11197440, while the sum is 59.

The spelling of 16890685394 in words is "sixteen billion, eight hundred ninety million, six hundred eighty-five thousand, three hundred ninety-four".