17996725 has 12 divisors (see below), whose sum is σ = 22632480. Its totient is φ = 14193200.

The previous prime is 17996707. The next prime is 17996729. The reversal of 17996725 is 52769971.

It is a happy number.

It is not a de Polignac number, because 17996725 - 2⁷ = 17996597 is a prime.

It is a super-2 number, since 2×17996725² = 647764221451250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17996729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3295 + ... + 6844.

It is an arithmetic number, because the mean of its divisors is an integer number (1886040).

Almost surely, 2^17996725 is an apocalyptic number.

It is an amenable number.

17996725 is a deficient number, since it is larger than the sum of its proper divisors (4635755).

17996725 is a wasteful number, since it uses less digits than its factorization.

17996725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10220 (or 10215 counting only the distinct ones).

The product of its digits is 238140, while the sum is 46.

The square root of 17996725 is about 4242.2547071104. The cubic root of 17996725 is about 262.0582441456.

It can be divided in two parts, 17996 and 725, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 17996725 in words is "seventeen million, nine hundred ninety-six thousand, seven hundred twenty-five".