16990323900 has 216 divisors, whose sum is σ = 54926869872. Its totient is φ = 4050816000.

The previous prime is 16990323877. The next prime is 16990323913. The reversal of 16990323900 is 932309961.

It is a happy number.

It is a super-2 number, since 2×16990323900² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2210464 + ... + 2218136.

Almost surely, 2^16990323900 is an apocalyptic number.

16990323900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16990323900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27463434936).

16990323900 is an abundant number, since it is smaller than the sum of its proper divisors (37936545972).

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

16990323900 is a wasteful number, since it uses less digits than its factorization.

16990323900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7773 (or 7755 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 42.

The spelling of 16990323900 in words is "sixteen billion, nine hundred ninety million, three hundred twenty-three thousand, nine hundred".