16920345 has 16 divisors (see below), whose sum is σ = 29155392. Its totient is φ = 8329920.

The previous prime is 16920313. The next prime is 16920347. The reversal of 16920345 is 54302961.

It is not a de Polignac number, because 16920345 - 2⁵ = 16920313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16920347) 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, 43191 + ... + 43580.

It is an arithmetic number, because the mean of its divisors is an integer number (1822212).

Almost surely, 2^16920345 is an apocalyptic number.

16920345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16920345 is a deficient number, since it is larger than the sum of its proper divisors (12235047).

16920345 is a wasteful number, since it uses less digits than its factorization.

16920345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86792.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 16920345 is about 4113.4346962119. The cubic root of 16920345 is about 256.7259312932.

The spelling of 16920345 in words is "sixteen million, nine hundred twenty thousand, three hundred forty-five".