18225594390 has 64 divisors (see below), whose sum is σ = 46073629440. Its totient is φ = 4601358720.

The previous prime is 18225594383. The next prime is 18225594397. The reversal of 18225594390 is 9349552281.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18225594383) and next prime (18225594397).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18225594397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 940600 + ... + 959780.

It is an arithmetic number, because the mean of its divisors is an integer number (719900460).

Almost surely, 2^18225594390 is an apocalyptic number.

18225594390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18225594390 is an abundant number, since it is smaller than the sum of its proper divisors (27848035050).

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

18225594390 is a wasteful number, since it uses less digits than its factorization.

18225594390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20877.

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 18225594390 in words is "eighteen billion, two hundred twenty-five million, five hundred ninety-four thousand, three hundred ninety".