18523862394 has 32 divisors (see below), whose sum is σ = 39006528000. Its totient is φ = 5848302384.

The previous prime is 18523862393. The next prime is 18523862471. The reversal of 18523862394 is 49326832581.

It is a happy number.

It is a super-2 number, since 2×18523862394² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18523862393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560667 + ... + 592785.

It is an arithmetic number, because the mean of its divisors is an integer number (1218954000).

Almost surely, 2^18523862394 is an apocalyptic number.

18523862394 is an abundant number, since it is smaller than the sum of its proper divisors (20482665606).

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

18523862394 is a wasteful number, since it uses less digits than its factorization.

18523862394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37202.

The product of its digits is 2488320, while the sum is 51.

The spelling of 18523862394 in words is "eighteen billion, five hundred twenty-three million, eight hundred sixty-two thousand, three hundred ninety-four".