16931955 has 16 divisors (see below), whose sum is σ = 27210240. Its totient is φ = 8990688.

The previous prime is 16931947. The next prime is 16931987. The reversal of 16931955 is 55913961.

It is not a de Polignac number, because 16931955 - 2³ = 16931947 is a prime.

It is a super-2 number, since 2×16931955² = 573382200244050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1224 + ... + 5946.

It is an arithmetic number, because the mean of its divisors is an integer number (1700640).

Almost surely, 2^16931955 is an apocalyptic number.

16931955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16931955 is a deficient number, since it is larger than the sum of its proper divisors (10278285).

16931955 is a wasteful number, since it uses less digits than its factorization.

16931955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4970.

The product of its digits is 36450, while the sum is 39.

The square root of 16931955 is about 4114.8456836193. The cubic root of 16931955 is about 256.7846359001.

The spelling of 16931955 in words is "sixteen million, nine hundred thirty-one thousand, nine hundred fifty-five".