18945125 has 8 divisors (see below), whose sum is σ = 23643672. Its totient is φ = 15156000.

The previous prime is 18945119. The next prime is 18945127. The reversal of 18945125 is 52154981.

It can be written as a sum of positive squares in 4 ways, for example, as 13924 + 18931201 = 118^2 + 4351^2 .

It is not a de Polignac number, because 18945125 - 2¹⁸ = 18682981 is a prime.

It is a super-2 number, since 2×18945125² = 717835522531250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18945127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75656 + ... + 75905.

It is an arithmetic number, because the mean of its divisors is an integer number (2955459).

Almost surely, 2^18945125 is an apocalyptic number.

It is an amenable number.

18945125 is a deficient number, since it is larger than the sum of its proper divisors (4698547).

18945125 is an equidigital number, since it uses as much as digits as its factorization.

18945125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151576 (or 151566 counting only the distinct ones).

The product of its digits is 14400, while the sum is 35.

The square root of 18945125 is about 4352.5997978220. The cubic root of 18945125 is about 266.5830249833.

Subtracting from 18945125 its sum of digits (35), we obtain a triangular number (18945090 = T₆₁₅₅).

The spelling of 18945125 in words is "eighteen million, nine hundred forty-five thousand, one hundred twenty-five".