16921690604 has 48 divisors (see below), whose sum is σ = 37044254016. Its totient is φ = 6584544000.

The previous prime is 16921690573. The next prime is 16921690609. The reversal of 16921690604 is 40609612961.

16921690604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16921690604² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16921690609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358847 + ... + 403254.

It is an arithmetic number, because the mean of its divisors is an integer number (771755292).

Almost surely, 2^16921690604 is an apocalyptic number.

16921690604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16921690604 is an abundant number, since it is smaller than the sum of its proper divisors (20122563412).

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

16921690604 is a wasteful number, since it uses less digits than its factorization.

16921690604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762186 (or 762184 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 16921690604 in words is "sixteen billion, nine hundred twenty-one million, six hundred ninety thousand, six hundred four".