18234968994 has 80 divisors (see below), whose sum is σ = 44786545056. Its totient is φ = 5499446400.

The previous prime is 18234968923. The next prime is 18234969019. The reversal of 18234968994 is 49986943281.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 351754 + ... + 400250.

Almost surely, 2^18234968994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18234968994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22393272528).

18234968994 is an abundant number, since it is smaller than the sum of its proper divisors (26551576062).

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

18234968994 is a wasteful number, since it uses less digits than its factorization.

18234968994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48733 (or 48724 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 63.

The spelling of 18234968994 in words is "eighteen billion, two hundred thirty-four million, nine hundred sixty-eight thousand, nine hundred ninety-four".