18840125 has 8 divisors (see below), whose sum is σ = 23512632. Its totient is φ = 15072000.

The previous prime is 18840121. The next prime is 18840137. The reversal of 18840125 is 52104881.

It can be written as a sum of positive squares in 4 ways, for example, as 573049 + 18267076 = 757^2 + 4274^2 .

It is not a de Polignac number, because 18840125 - 2² = 18840121 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 (18840121) 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, 75236 + ... + 75485.

It is an arithmetic number, because the mean of its divisors is an integer number (2939079).

Almost surely, 2^18840125 is an apocalyptic number.

It is an amenable number.

18840125 is a deficient number, since it is larger than the sum of its proper divisors (4672507).

18840125 is an equidigital number, since it uses as much as digits as its factorization.

18840125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150736 (or 150726 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 18840125 is about 4340.5212820582. The cubic root of 18840125 is about 266.0896159126.

It can be divided in two parts, 18 and 840125, that multiplied together give a triangular number (15122250 = T₅₄₉₉).

The spelling of 18840125 in words is "eighteen million, eight hundred forty thousand, one hundred twenty-five".