18087755025 has 24 divisors (see below), whose sum is σ = 30016293120. Its totient is φ = 9610930240.

The previous prime is 18087755017. The next prime is 18087755027. The reversal of 18087755025 is 52055778081.

It is not a de Polignac number, because 18087755025 - 2³ = 18087755017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18087755027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 428097 + ... + 468446.

It is an arithmetic number, because the mean of its divisors is an integer number (1250678880).

Almost surely, 2^18087755025 is an apocalyptic number.

18087755025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18087755025 is a deficient number, since it is larger than the sum of its proper divisors (11928538095).

18087755025 is a wasteful number, since it uses less digits than its factorization.

18087755025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896825 (or 896820 counting only the distinct ones).

The product of its (nonzero) digits is 784000, while the sum is 48.

The spelling of 18087755025 in words is "eighteen billion, eighty-seven million, seven hundred fifty-five thousand, twenty-five".