18130524421 has 4 divisors (see below), whose sum is σ = 18130795200. Its totient is φ = 18130253644.

The previous prime is 18130524397. The next prime is 18130524457. The reversal of 18130524421 is 12442503181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18130524421 - 2⁵ = 18130524389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18130524491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46500 + ... + 196018.

It is an arithmetic number, because the mean of its divisors is an integer number (4532698800).

Almost surely, 2^18130524421 is an apocalyptic number.

It is an amenable number.

18130524421 is a deficient number, since it is larger than the sum of its proper divisors (270779).

18130524421 is a wasteful number, since it uses less digits than its factorization.

18130524421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270778.

The product of its (nonzero) digits is 7680, while the sum is 31.

The spelling of 18130524421 in words is "eighteen billion, one hundred thirty million, five hundred twenty-four thousand, four hundred twenty-one".