16681372 has 6 divisors (see below), whose sum is σ = 29192408. Its totient is φ = 8340684.

The previous prime is 16681363. The next prime is 16681397. The reversal of 16681372 is 27318661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2085168 + ... + 2085175.

Almost surely, 2^16681372 is an apocalyptic number.

It is an amenable number.

16681372 is a deficient number, since it is larger than the sum of its proper divisors (12511036).

16681372 is a wasteful number, since it uses less digits than its factorization.

16681372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170347 (or 4170345 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 16681372 is about 4084.2835357012. The cubic root of 16681372 is about 255.5115809513.

The spelling of 16681372 in words is "sixteen million, six hundred eighty-one thousand, three hundred seventy-two".