16921906602 has 16 divisors (see below), whose sum is σ = 34563894912. Its totient is φ = 5520621920.

The previous prime is 16921906553. The next prime is 16921906663. The reversal of 16921906602 is 20660912961.

It is a happy number.

It is a super-2 number, since 2×16921906602² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 30003099 + ... + 30003662.

It is an arithmetic number, because the mean of its divisors is an integer number (2160243432).

Almost surely, 2^16921906602 is an apocalyptic number.

16921906602 is an abundant number, since it is smaller than the sum of its proper divisors (17641988310).

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

16921906602 is a wasteful number, since it uses less digits than its factorization.

16921906602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60006813.

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 16921906602 in words is "sixteen billion, nine hundred twenty-one million, nine hundred six thousand, six hundred two".