16690900 has 18 divisors (see below), whose sum is σ = 36219470. Its totient is φ = 6676320.

The previous prime is 16690897. The next prime is 16690903. The reversal of 16690900 is 909661.

It is an interprime number because it is at equal distance from previous prime (16690897) and next prime (16690903).

It can be written as a sum of positive squares in 3 ways, for example, as 1056784 + 15634116 = 1028^2 + 3954^2 .

It is a super-2 number, since 2×16690900² = 557172285620000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16690903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83355 + ... + 83554.

Almost surely, 2^16690900 is an apocalyptic number.

16690900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16690900 is an abundant number, since it is smaller than the sum of its proper divisors (19528570).

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

16690900 is a wasteful number, since it uses less digits than its factorization.

16690900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166923 (or 166916 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 16690900 is about 4085.4497916386. The cubic root of 16690900 is about 255.5602190565.

The spelling of 16690900 in words is "sixteen million, six hundred ninety thousand, nine hundred".