16923825 has 18 divisors (see below), whose sum is σ = 30312854. Its totient is φ = 9025920.

The previous prime is 16923821. The next prime is 16923847. The reversal of 16923825 is 52832961.

It can be written as a sum of positive squares in 3 ways, for example, as 7056 + 16916769 = 84^2 + 4113^2 .

It is not a de Polignac number, because 16923825 - 2² = 16923821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16923825.

It is not an unprimeable number, because it can be changed into a prime (16923821) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 37384 + ... + 37833.

Almost surely, 2^16923825 is an apocalyptic number.

16923825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16923825 is a deficient number, since it is larger than the sum of its proper divisors (13389029).

16923825 is a wasteful number, since it uses less digits than its factorization.

16923825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75233 (or 75225 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 16923825 is about 4113.8576786272. The cubic root of 16923825 is about 256.7435303236.

The spelling of 16923825 in words is "sixteen million, nine hundred twenty-three thousand, eight hundred twenty-five".