18149992125 has 16 divisors (see below), whose sum is σ = 30201587520. Its totient is φ = 9679995600.

The previous prime is 18149992121. The next prime is 18149992187. The reversal of 18149992125 is 52129994181.

It is not a de Polignac number, because 18149992125 - 2² = 18149992121 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18149992121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24199615 + ... + 24200364.

It is an arithmetic number, because the mean of its divisors is an integer number (1887599220).

Almost surely, 2^18149992125 is an apocalyptic number.

18149992125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18149992125 is a deficient number, since it is larger than the sum of its proper divisors (12051595395).

18149992125 is an equidigital number, since it uses as much as digits as its factorization.

18149992125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48399997 (or 48399987 counting only the distinct ones).

The product of its digits is 466560, while the sum is 51.

The spelling of 18149992125 in words is "eighteen billion, one hundred forty-nine million, nine hundred ninety-two thousand, one hundred twenty-five".