18791125 has 8 divisors (see below), whose sum is σ = 23451480. Its totient is φ = 15032800.

The previous prime is 18791107. The next prime is 18791141. The reversal of 18791125 is 52119781.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7569 + 18783556 = 87^2 + 4334^2 .

It is not a de Polignac number, because 18791125 - 2¹⁹ = 18266837 is a prime.

It is a congruent number.

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, 75040 + ... + 75289.

It is an arithmetic number, because the mean of its divisors is an integer number (2931435).

Almost surely, 2^18791125 is an apocalyptic number.

It is an amenable number.

18791125 is a deficient number, since it is larger than the sum of its proper divisors (4660355).

18791125 is an equidigital number, since it uses as much as digits as its factorization.

18791125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150344 (or 150334 counting only the distinct ones).

The product of its digits is 5040, while the sum is 34.

The square root of 18791125 is about 4334.8731238642. The cubic root of 18791125 is about 265.8587308363.

The spelling of 18791125 in words is "eighteen million, seven hundred ninety-one thousand, one hundred twenty-five".