18935225125 has 8 divisors (see below), whose sum is σ = 23631161112. Its totient is φ = 15148180000.

The previous prime is 18935225123. The next prime is 18935225131. The reversal of 18935225125 is 52152253981.

It can be written as a sum of positive squares in 4 ways, for example, as 966090724 + 17969134401 = 31082^2 + 134049^2 .

It is not a de Polignac number, because 18935225125 - 2¹ = 18935225123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18935225123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75740776 + ... + 75741025.

It is an arithmetic number, because the mean of its divisors is an integer number (2953895139).

Almost surely, 2^18935225125 is an apocalyptic number.

It is an amenable number.

18935225125 is a deficient number, since it is larger than the sum of its proper divisors (4695935987).

18935225125 is an equidigital number, since it uses as much as digits as its factorization.

18935225125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151481816 (or 151481806 counting only the distinct ones).

The product of its digits is 216000, while the sum is 43.

The spelling of 18935225125 in words is "eighteen billion, nine hundred thirty-five million, two hundred twenty-five thousand, one hundred twenty-five".