18403134876 has 120 divisors (see below), whose sum is σ = 55056599136. Its totient is φ = 5250925440.

The previous prime is 18403134863. The next prime is 18403134889. The reversal of 18403134876 is 67843130481.

It is an interprime number because it is at equal distance from previous prime (18403134863) and next prime (18403134889).

It is a congruent number.

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, 1802506 + ... + 1812686.

Almost surely, 2^18403134876 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18403134876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27528299568).

18403134876 is an abundant number, since it is smaller than the sum of its proper divisors (36653464260).

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

18403134876 is a wasteful number, since it uses less digits than its factorization.

18403134876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11001 (or 10990 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 18403134876 in words is "eighteen billion, four hundred three million, one hundred thirty-four thousand, eight hundred seventy-six".