18594019242 has 24 divisors (see below), whose sum is σ = 40290605316. Its totient is φ = 6197458176.

The previous prime is 18594019231. The next prime is 18594019243. The reversal of 18594019242 is 24291049581.

It is a happy number.

18594019242 is a `hidden beast` number, since 1 + 8 + 594 + 0 + 19 + 2 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15810296121 + 2783723121 = 125739^2 + 52761^2 .

It is not an unprimeable number, because it can be changed into a prime (18594019243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198828 + ... + 276984.

Almost surely, 2^18594019242 is an apocalyptic number.

18594019242 is an abundant number, since it is smaller than the sum of its proper divisors (21696586074).

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

18594019242 is a wasteful number, since it uses less digits than its factorization.

18594019242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91382 (or 91379 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 18594019242 in words is "eighteen billion, five hundred ninety-four million, nineteen thousand, two hundred forty-two".