18000181830 has 16 divisors (see below), whose sum is σ = 43200436464. Its totient is φ = 4800048480.

The previous prime is 18000181817. The next prime is 18000181831. The reversal of 18000181830 is 3818100081.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 600006061 = 18000181830 / (1 + 8 + 0 + 0 + 0 + 1 + 8 + 1 + 8 + 3 + 0).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18000181831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300003001 + ... + 300003060.

It is an arithmetic number, because the mean of its divisors is an integer number (2700027279).

Almost surely, 2^18000181830 is an apocalyptic number.

18000181830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18000181830 is an abundant number, since it is smaller than the sum of its proper divisors (25200254634).

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

18000181830 is a wasteful number, since it uses less digits than its factorization.

18000181830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600006071.

The product of its (nonzero) digits is 1536, while the sum is 30.

The spelling of 18000181830 in words is "eighteen billion, one hundred eighty-one thousand, eight hundred thirty".