16904921786 has 16 divisors (see below), whose sum is σ = 26146501920. Its totient is φ = 8191242000.

The previous prime is 16904921753. The next prime is 16904921797. The reversal of 16904921786 is 68712940961.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436496 + ... + 473643.

It is an arithmetic number, because the mean of its divisors is an integer number (1634156370).

Almost surely, 2^16904921786 is an apocalyptic number.

16904921786 is a deficient number, since it is larger than the sum of its proper divisors (9241580134).

16904921786 is a wasteful number, since it uses less digits than its factorization.

16904921786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910429.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 16904921786 in words is "sixteen billion, nine hundred four million, nine hundred twenty-one thousand, seven hundred eighty-six".