18295225921 has 8 divisors (see below), whose sum is σ = 20911143680. Its totient is φ = 15679886688.

The previous prime is 18295225889. The next prime is 18295225931. The reversal of 18295225921 is 12952259281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18295225921 - 2⁵ = 18295225889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18295225931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74601 + ... + 205318.

It is an arithmetic number, because the mean of its divisors is an integer number (2613892960).

Almost surely, 2^18295225921 is an apocalyptic number.

It is an amenable number.

18295225921 is a deficient number, since it is larger than the sum of its proper divisors (2615917759).

18295225921 is an equidigital number, since it uses as much as digits as its factorization.

18295225921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289263.

The product of its digits is 259200, while the sum is 46.

The spelling of 18295225921 in words is "eighteen billion, two hundred ninety-five million, two hundred twenty-five thousand, nine hundred twenty-one".