18042025 has 12 divisors (see below), whose sum is σ = 22428252. Its totient is φ = 14397440.

The previous prime is 18041987. The next prime is 18042029. The reversal of 18042025 is 52024081.

18042025 = 3003² + 3004².

It can be written as a sum of positive squares in 6 ways, for example, as 502681 + 17539344 = 709^2 + 4188^2 .

It is not a de Polignac number, because 18042025 - 2²³ = 9653417 is a prime.

It is a super-2 number, since 2×18042025² = 651029332201250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18041987 and 18042005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18042029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14217 + ... + 15433.

It is an arithmetic number, because the mean of its divisors is an integer number (1869021).

Almost surely, 2^18042025 is an apocalyptic number.

18042025 is the 3004-th centered square number.

It is an amenable number.

18042025 is a deficient number, since it is larger than the sum of its proper divisors (4386227).

18042025 is a wasteful number, since it uses less digits than its factorization.

18042025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820 (or 1815 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 18042025 is about 4247.5904934445. The cubic root of 18042025 is about 262.2779376714.

The spelling of 18042025 in words is "eighteen million, forty-two thousand, twenty-five".