16330931 has 4 divisors (see below), whose sum is σ = 17291592. Its totient is φ = 15370272.

The previous prime is 16330913. The next prime is 16330939. The reversal of 16330931 is 13903361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16330931 is a prime.

It is a super-2 number, since 2×16330931² = 533398614653522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16330931.

It is not an unprimeable number, because it can be changed into a prime (16330939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480305 + ... + 480338.

It is an arithmetic number, because the mean of its divisors is an integer number (4322898).

Almost surely, 2^16330931 is an apocalyptic number.

16330931 is a deficient number, since it is larger than the sum of its proper divisors (960661).

16330931 is an equidigital number, since it uses as much as digits as its factorization.

16330931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960660.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 16330931 is about 4041.1546617273. The cubic root of 16330931 is about 253.7096471378.

The spelling of 16330931 in words is "sixteen million, three hundred thirty thousand, nine hundred thirty-one".