18145195925 has 6 divisors (see below), whose sum is σ = 22500042978. Its totient is φ = 14516156720.

The previous prime is 18145195921. The next prime is 18145195927. The reversal of 18145195925 is 52959154181.

It can be written as a sum of positive squares in 3 ways, for example, as 1996123684 + 16149072241 = 44678^2 + 127079^2 .

It is not a de Polignac number, because 18145195925 - 2² = 18145195921 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 (18145195921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 362903894 + ... + 362903943.

It is an arithmetic number, because the mean of its divisors is an integer number (3750007163).

Almost surely, 2^18145195925 is an apocalyptic number.

It is an amenable number.

18145195925 is a deficient number, since it is larger than the sum of its proper divisors (4354847053).

18145195925 is an equidigital number, since it uses as much as digits as its factorization.

18145195925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725807847 (or 725807842 counting only the distinct ones).

The product of its digits is 648000, while the sum is 50.

The spelling of 18145195925 in words is "eighteen billion, one hundred forty-five million, one hundred ninety-five thousand, nine hundred twenty-five".