18801968425 has 12 divisors (see below), whose sum is σ = 23317620300. Its totient is φ = 15039523520.

The previous prime is 18801968411. The next prime is 18801968509. The reversal of 18801968425 is 52486910881.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 5020147609 + 13781820816 = 70853^2 + 117396^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18801968425 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151419 + ... + 246031.

It is an arithmetic number, because the mean of its divisors is an integer number (1943135025).

Almost surely, 2^18801968425 is an apocalyptic number.

It is an amenable number.

18801968425 is a deficient number, since it is larger than the sum of its proper divisors (4515651875).

18801968425 is an equidigital number, since it uses as much as digits as its factorization.

18801968425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102572 (or 102567 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 52.

The spelling of 18801968425 in words is "eighteen billion, eight hundred one million, nine hundred sixty-eight thousand, four hundred twenty-five".