18198380825 has 12 divisors (see below), whose sum is σ = 22570378320. Its totient is φ = 14555874960.

The previous prime is 18198380807. The next prime is 18198380831. The reversal of 18198380825 is 52808389181.

It is not a de Polignac number, because 18198380825 - 2²⁰ = 18197332249 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, 65606 + ... + 201744.

It is an arithmetic number, because the mean of its divisors is an integer number (1880864860).

Almost surely, 2^18198380825 is an apocalyptic number.

It is an amenable number.

18198380825 is a deficient number, since it is larger than the sum of its proper divisors (4371997495).

18198380825 is a wasteful number, since it uses less digits than its factorization.

18198380825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141496 (or 141491 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 53.

The spelling of 18198380825 in words is "eighteen billion, one hundred ninety-eight million, three hundred eighty thousand, eight hundred twenty-five".