18302028390 has 24 divisors (see below), whose sum is σ = 47585274048. Its totient is φ = 4880540880.

The previous prime is 18302028379. The next prime is 18302028421. The reversal of 18302028390 is 9382020381.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101677846 + ... + 101678025.

It is an arithmetic number, because the mean of its divisors is an integer number (1982719752).

Almost surely, 2^18302028390 is an apocalyptic number.

18302028390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18302028390 is an abundant number, since it is smaller than the sum of its proper divisors (29283245658).

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

18302028390 is a wasteful number, since it uses less digits than its factorization.

18302028390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203355884 (or 203355881 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 18302028390 in words is "eighteen billion, three hundred two million, twenty-eight thousand, three hundred ninety".