16990209700 has 72 divisors (see below), whose sum is σ = 40383743400. Its totient is φ = 6175733760.

The previous prime is 16990209661. The next prime is 16990209701. The reversal of 16990209700 is 790209961.

It can be written as a sum of positive squares in 12 ways, for example, as 6706627236 + 10283582464 = 81894^2 + 101408^2 .

It is not an unprimeable number, because it can be changed into a prime (16990209701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123015 + ... + 221614.

It is an arithmetic number, because the mean of its divisors is an integer number (560885325).

Almost surely, 2^16990209700 is an apocalyptic number.

16990209700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16990209700 is an abundant number, since it is smaller than the sum of its proper divisors (23393533700).

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

16990209700 is a wasteful number, since it uses less digits than its factorization.

16990209700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344689 (or 344682 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 43.

The spelling of 16990209700 in words is "sixteen billion, nine hundred ninety million, two hundred nine thousand, seven hundred".