18243360394 has 16 divisors (see below), whose sum is σ = 31280504256. Its totient is φ = 7817040000.

The previous prime is 18243360329. The next prime is 18243360437. The reversal of 18243360394 is 49306334281.

It is a self number, because there is not a number n which added to its sum of digits gives 18243360394.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53607 + ... + 198394.

It is an arithmetic number, because the mean of its divisors is an integer number (1955031516).

Almost surely, 2^18243360394 is an apocalyptic number.

18243360394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18243360394 is a deficient number, since it is larger than the sum of its proper divisors (13037143862).

18243360394 is a wasteful number, since it uses less digits than its factorization.

18243360394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257181.

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 18243360394 in words is "eighteen billion, two hundred forty-three million, three hundred sixty thousand, three hundred ninety-four".