18189377424 has 45 divisors (see below), whose sum is σ = 50909523483. Its totient is φ = 6062586336.

The previous prime is 18189377413. The next prime is 18189377449. The reversal of 18189377424 is 42477398181.

The square root of 18189377424 is 134868.

It is a perfect power (a square), and thus also a powerful number.

18189377424 is a `hidden beast` number, since 1 + 8 + 189 + 37 + 7 + 424 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1612797 + ... + 1624035.

Almost surely, 2^18189377424 is an apocalyptic number.

18189377424 is the 134868-th square number.

It is an amenable number.

18189377424 is an abundant number, since it is smaller than the sum of its proper divisors (32720146059).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18189377424 is an frugal number, since it uses more digits than its factorization.

18189377424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22492 (or 11244 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The spelling of 18189377424 in words is "eighteen billion, one hundred eighty-nine million, three hundred seventy-seven thousand, four hundred twenty-four".