18473495040 has 1600 divisors, whose sum is σ = 89836750080. Its totient is φ = 3503554560.

The previous prime is 18473495039. The next prime is 18473495071. The reversal of 18473495040 is 4059437481.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 207567316 + ... + 207567404.

Almost surely, 2^18473495040 is an apocalyptic number.

18473495040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18473495040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44918375040).

18473495040 is an abundant number, since it is smaller than the sum of its proper divisors (71363255040).

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

18473495040 is a wasteful number, since it uses less digits than its factorization.

18473495040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 18473495040 in words is "eighteen billion, four hundred seventy-three million, four hundred ninety-five thousand, forty".