18783501725 has 12 divisors (see below), whose sum is σ = 23393259060. Its totient is φ = 14961177600.

The previous prime is 18783501719. The next prime is 18783501743. The reversal of 18783501725 is 52710538781.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 98525476 + 18684976249 = 9926^2 + 136693^2 .

It is not a de Polignac number, because 18783501725 - 2¹⁸ = 18783239581 is a prime.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18783501725.

It is a congruent number.

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, 1634756 + ... + 1646205.

It is an arithmetic number, because the mean of its divisors is an integer number (1949438255).

Almost surely, 2^18783501725 is an apocalyptic number.

It is an amenable number.

18783501725 is a deficient number, since it is larger than the sum of its proper divisors (4609757335).

18783501725 is a wasteful number, since it uses less digits than its factorization.

18783501725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281200 (or 3281195 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 47.

The spelling of 18783501725 in words is "eighteen billion, seven hundred eighty-three million, five hundred one thousand, seven hundred twenty-five".