16368681 has 16 divisors (see below), whose sum is σ = 25524224. Its totient is φ = 9135504.

The previous prime is 16368661. The next prime is 16368701. The reversal of 16368681 is 18686361.

16368681 is digitally balanced in base 2, base 4 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16368661) and next prime (16368701).

It is not a de Polignac number, because 16368681 - 2⁹ = 16368169 is a prime.

It is a super-2 number, since 2×16368681² = 535867435359522, which contains 22 as substring.

It is a Duffinian number.

16368681 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (16368601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8161 + ... + 9966.

It is an arithmetic number, because the mean of its divisors is an integer number (1595264).

Almost surely, 2^16368681 is an apocalyptic number.

It is an amenable number.

16368681 is a deficient number, since it is larger than the sum of its proper divisors (9155543).

16368681 is a wasteful number, since it uses less digits than its factorization.

16368681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18180.

The product of its digits is 41472, while the sum is 39.

The square root of 16368681 is about 4045.8226604734. The cubic root of 16368681 is about 253.9049854388.

The spelling of 16368681 in words is "sixteen million, three hundred sixty-eight thousand, six hundred eighty-one".