18108478734 has 16 divisors (see below), whose sum is σ = 36757509888. Its totient is φ = 5946067512.

The previous prime is 18108478721. The next prime is 18108478747. The reversal of 18108478734 is 43787480181.

It is an interprime number because it is at equal distance from previous prime (18108478721) and next prime (18108478747).

It is a congruent number.

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, 22522582 + ... + 22523385.

It is an arithmetic number, because the mean of its divisors is an integer number (2297344368).

Almost surely, 2^18108478734 is an apocalyptic number.

18108478734 is an abundant number, since it is smaller than the sum of its proper divisors (18649031154).

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

18108478734 is a wasteful number, since it uses less digits than its factorization.

18108478734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45046039.

The product of its (nonzero) digits is 1204224, while the sum is 51.

The spelling of 18108478734 in words is "eighteen billion, one hundred eight million, four hundred seventy-eight thousand, seven hundred thirty-four".