18295225920 has 448 divisors, whose sum is σ = 68733619200. Its totient is φ = 4581089280.

The previous prime is 18295225889. The next prime is 18295225931. The reversal of 18295225920 is 2952259281.

It is a happy number.

18295225920 is a `hidden beast` number, since 1 + 8 + 2 + 9 + 52 + 2 + 592 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42448105 + ... + 42448535.

Almost surely, 2^18295225920 is an apocalyptic number.

18295225920 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 18295225920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34366809600).

18295225920 is an abundant number, since it is smaller than the sum of its proper divisors (50438393280).

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

18295225920 is an equidigital number, since it uses as much as digits as its factorization.

18295225920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 18295225920 in words is "eighteen billion, two hundred ninety-five million, two hundred twenty-five thousand, nine hundred twenty".