18125965 has 32 divisors (see below), whose sum is σ = 25909632. Its totient is φ = 12000000.

The previous prime is 18125963. The next prime is 18125969. The reversal of 18125965 is 56952181.

It is not a de Polignac number, because 18125965 - 2¹ = 18125963 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 (18125963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72090 + ... + 72340.

It is an arithmetic number, because the mean of its divisors is an integer number (809676).

Almost surely, 2^18125965 is an apocalyptic number.

It is an amenable number.

18125965 is a deficient number, since it is larger than the sum of its proper divisors (7783667).

18125965 is a wasteful number, since it uses less digits than its factorization.

18125965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381.

The product of its digits is 21600, while the sum is 37.

The square root of 18125965 is about 4257.4599234755. The cubic root of 18125965 is about 262.6840553463.

It can be divided in two parts, 1812 and 5965, that added together give a palindrome (7777).

The spelling of 18125965 in words is "eighteen million, one hundred twenty-five thousand, nine hundred sixty-five".