18194552320 has 160 divisors (see below), whose sum is σ = 50799659328. Its totient is φ = 6120112128.

The previous prime is 18194552303. The next prime is 18194552347. The reversal of 18194552320 is 2325549181.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 940182 + ... + 959338.

Almost surely, 2^18194552320 is an apocalyptic number.

18194552320 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 18194552320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25399829664).

18194552320 is an abundant number, since it is smaller than the sum of its proper divisors (32605107008).

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

18194552320 is an equidigital number, since it uses as much as digits as its factorization.

18194552320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19240 (or 19224 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 18194552320 in words is "eighteen billion, one hundred ninety-four million, five hundred fifty-two thousand, three hundred twenty".