18409605124 has 27 divisors (see below), whose sum is σ = 32483504487. Its totient is φ = 9129227688.

The previous prime is 18409605079. The next prime is 18409605127. The reversal of 18409605124 is 42150690481.

The square root of 18409605124 is 135682.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18409605127) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 48573967 + ... + 48574345.

Almost surely, 2^18409605124 is an apocalyptic number.

18409605124 is the 135682-nd square number.

It is an amenable number.

18409605124 is a deficient number, since it is larger than the sum of its proper divisors (14073899363).

18409605124 is an frugal number, since it uses more digits than its factorization.

18409605124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 18409605124 in words is "eighteen billion, four hundred nine million, six hundred five thousand, one hundred twenty-four".