18425131 has 4 divisors (see below), whose sum is σ = 18520792. Its totient is φ = 18329472.

The previous prime is 18425123. The next prime is 18425137. The reversal of 18425131 is 13152481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13152481 = 23 ⋅571847.

It is a cyclic number.

It is not a de Polignac number, because 18425131 - 2³ = 18425123 is a prime.

It is a super-2 number, since 2×18425131² = 678970904734322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18425096 and 18425105.

It is not an unprimeable number, because it can be changed into a prime (18425137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47541 + ... + 47926.

It is an arithmetic number, because the mean of its divisors is an integer number (4630198).

Almost surely, 2^18425131 is an apocalyptic number.

18425131 is a deficient number, since it is larger than the sum of its proper divisors (95661).

18425131 is an equidigital number, since it uses as much as digits as its factorization.

18425131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95660.

The product of its digits is 960, while the sum is 25.

The square root of 18425131 is about 4292.4504656431. The cubic root of 18425131 is about 264.1213619771.

The spelling of 18425131 in words is "eighteen million, four hundred twenty-five thousand, one hundred thirty-one".