16381730 has 16 divisors (see below), whose sum is σ = 29721600. Its totient is φ = 6500592.

The previous prime is 16381699. The next prime is 16381747. The reversal of 16381730 is 3718361.

It is a super-2 number, since 2×16381730² = 536722155585800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16381693 and 16381702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5180 + ... + 7719.

It is an arithmetic number, because the mean of its divisors is an integer number (1857600).

Almost surely, 2^16381730 is an apocalyptic number.

16381730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16381730 is a deficient number, since it is larger than the sum of its proper divisors (13339870).

16381730 is a wasteful number, since it uses less digits than its factorization.

16381730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13033.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 16381730 is about 4047.4349902129. The cubic root of 16381730 is about 253.9724379542.

The spelling of 16381730 in words is "sixteen million, three hundred eighty-one thousand, seven hundred thirty".