18153868738 has 8 divisors (see below), whose sum is σ = 27273960000. Its totient is φ = 9062548740.

The previous prime is 18153868723. The next prime is 18153868741. The reversal of 18153868738 is 83786835181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7191238 + ... + 7193761.

It is an arithmetic number, because the mean of its divisors is an integer number (3409245000).

Almost surely, 2^18153868738 is an apocalyptic number.

18153868738 is a deficient number, since it is larger than the sum of its proper divisors (9120091262).

18153868738 is a wasteful number, since it uses less digits than its factorization.

18153868738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14385632.

The product of its digits is 7741440, while the sum is 58.

The spelling of 18153868738 in words is "eighteen billion, one hundred fifty-three million, eight hundred sixty-eight thousand, seven hundred thirty-eight".