18395728390 has 32 divisors (see below), whose sum is σ = 37757028960. Its totient is φ = 6392722944.

The previous prime is 18395728363. The next prime is 18395728469. The reversal of 18395728390 is 9382759381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4159720 + ... + 4164139.

It is an arithmetic number, because the mean of its divisors is an integer number (1179907155).

Almost surely, 2^18395728390 is an apocalyptic number.

18395728390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18395728390 is an abundant number, since it is smaller than the sum of its proper divisors (19361300570).

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

18395728390 is a wasteful number, since it uses less digits than its factorization.

18395728390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8323896.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 18395728390 in words is "eighteen billion, three hundred ninety-five million, seven hundred twenty-eight thousand, three hundred ninety".