18685751325 has 12 divisors (see below), whose sum is σ = 30893775648. Its totient is φ = 9965734000.

The previous prime is 18685751321. The next prime is 18685751327. The reversal of 18685751325 is 52315758681.

It is not a de Polignac number, because 18685751325 - 2² = 18685751321 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18685751321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124571601 + ... + 124571750.

It is an arithmetic number, because the mean of its divisors is an integer number (2574481304).

Almost surely, 2^18685751325 is an apocalyptic number.

18685751325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18685751325 is a deficient number, since it is larger than the sum of its proper divisors (12208024323).

18685751325 is a wasteful number, since it uses less digits than its factorization.

18685751325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249143364 (or 249143359 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 51.

The spelling of 18685751325 in words is "eighteen billion, six hundred eighty-five million, seven hundred fifty-one thousand, three hundred twenty-five".