16681692 has 24 divisors (see below), whose sum is σ = 41214096. Its totient is φ = 5233408.

The previous prime is 16681681. The next prime is 16681703. The reversal of 16681692 is 29618661.

It is an interprime number because it is at equal distance from previous prime (16681681) and next prime (16681703).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16681692.

It is a congruent 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, 40683 + ... + 41090.

It is an arithmetic number, because the mean of its divisors is an integer number (1717254).

Almost surely, 2^16681692 is an apocalyptic number.

16681692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16681692 is an abundant number, since it is smaller than the sum of its proper divisors (24532404).

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

16681692 is a wasteful number, since it uses less digits than its factorization.

16681692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81797 (or 81795 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 16681692 is about 4084.3227100708. The cubic root of 16681692 is about 255.5132147735.

The spelling of 16681692 in words is "sixteen million, six hundred eighty-one thousand, six hundred ninety-two".