16923730 has 16 divisors (see below), whose sum is σ = 30509784. Its totient is φ = 6759040.

The previous prime is 16923727. The next prime is 16923749. The reversal of 16923730 is 3732961.

It can be written as a sum of positive squares in 4 ways, for example, as 16900321 + 23409 = 4111^2 + 153^2 .

It is a super-2 number, since 2×16923730² = 572825274225800, which contains 22 as substring.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 16923692 and 16923701.

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, 11094 + ... + 12526.

Almost surely, 2^16923730 is an apocalyptic number.

16923730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16923730 is a deficient number, since it is larger than the sum of its proper divisors (13586054).

16923730 is a wasteful number, since it uses less digits than its factorization.

16923730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 16923730 is about 4113.8461322709. The cubic root of 16923730 is about 256.7430499224.

The spelling of 16923730 in words is "sixteen million, nine hundred twenty-three thousand, seven hundred thirty".