16493381 has 8 divisors (see below), whose sum is σ = 17238144. Its totient is φ = 15765120.

The previous prime is 16493377. The next prime is 16493413. The reversal of 16493381 is 18339461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16493381 - 2² = 16493377 is a prime.

It is a super-2 number, since 2×16493381² = 544063233622322, 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 (16493341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2060 + ... + 6101.

It is an arithmetic number, because the mean of its divisors is an integer number (2154768).

Almost surely, 2^16493381 is an apocalyptic number.

It is an amenable number.

16493381 is a deficient number, since it is larger than the sum of its proper divisors (744763).

16493381 is an equidigital number, since it uses as much as digits as its factorization.

16493381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8251.

The product of its digits is 15552, while the sum is 35.

The square root of 16493381 is about 4061.2043780140. The cubic root of 16493381 is about 254.5481219224.

The spelling of 16493381 in words is "sixteen million, four hundred ninety-three thousand, three hundred eighty-one".