18784325725 has 24 divisors (see below), whose sum is σ = 25731745920. Its totient is φ = 13488384000.

The previous prime is 18784325719. The next prime is 18784325731. The reversal of 18784325725 is 52752348781.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18784325719) and next prime (18784325731).

It is not a de Polignac number, because 18784325725 - 2⁹ = 18784325213 is a prime.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 410596 + ... + 454045.

It is an arithmetic number, because the mean of its divisors is an integer number (1072156080).

Almost surely, 2^18784325725 is an apocalyptic number.

It is an amenable number.

18784325725 is a deficient number, since it is larger than the sum of its proper divisors (6947420195).

18784325725 is a wasteful number, since it uses less digits than its factorization.

18784325725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864741 (or 864736 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 52.

The spelling of 18784325725 in words is "eighteen billion, seven hundred eighty-four million, three hundred twenty-five thousand, seven hundred twenty-five".