16929381 has 16 divisors (see below), whose sum is σ = 25937024. Its totient is φ = 9621504.

The previous prime is 16929377. The next prime is 16929397. The reversal of 16929381 is 18392961.

It is not a de Polignac number, because 16929381 - 2² = 16929377 is a prime.

It is a super-2 number, since 2×16929381² = 573207882086322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16929371) 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, 1965 + ... + 6141.

It is an arithmetic number, because the mean of its divisors is an integer number (1621064).

Almost surely, 2^16929381 is an apocalyptic number.

It is an amenable number.

16929381 is a deficient number, since it is larger than the sum of its proper divisors (9007643).

16929381 is a wasteful number, since it uses less digits than its factorization.

16929381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4380.

The product of its digits is 23328, while the sum is 39.

The square root of 16929381 is about 4114.5329018006. The cubic root of 16929381 is about 256.7716230860.

The spelling of 16929381 in words is "sixteen million, nine hundred twenty-nine thousand, three hundred eighty-one".