18512243354 has 32 divisors (see below), whose sum is σ = 30704154624. Its totient is φ = 8301008880.

The previous prime is 18512243333. The next prime is 18512243357. The reversal of 18512243354 is 45334221581.

It is not an unprimeable number, because it can be changed into a prime (18512243357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 580427 + ... + 611489.

It is an arithmetic number, because the mean of its divisors is an integer number (959504832).

Almost surely, 2^18512243354 is an apocalyptic number.

18512243354 is a deficient number, since it is larger than the sum of its proper divisors (12191911270).

18512243354 is a wasteful number, since it uses less digits than its factorization.

18512243354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31442.

The product of its digits is 115200, while the sum is 38.

The spelling of 18512243354 in words is "eighteen billion, five hundred twelve million, two hundred forty-three thousand, three hundred fifty-four".