18725837 has 4 divisors (see below), whose sum is σ = 20166300. Its totient is φ = 17285376.

The previous prime is 18725821. The next prime is 18725893. The reversal of 18725837 is 73852781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73852781 = 467 ⋅158143.

It can be written as a sum of positive squares in 2 ways, for example, as 866761 + 17859076 = 931^2 + 4226^2 .

It is a cyclic number.

It is not a de Polignac number, because 18725837 - 2⁴ = 18725821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18725794 and 18725803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18725137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720212 + ... + 720237.

It is an arithmetic number, because the mean of its divisors is an integer number (5041575).

Almost surely, 2^18725837 is an apocalyptic number.

It is an amenable number.

18725837 is a deficient number, since it is larger than the sum of its proper divisors (1440463).

18725837 is a wasteful number, since it uses less digits than its factorization.

18725837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440462.

The product of its digits is 94080, while the sum is 41.

The square root of 18725837 is about 4327.3360165349. The cubic root of 18725837 is about 265.5504731541.

The spelling of 18725837 in words is "eighteen million, seven hundred twenty-five thousand, eight hundred thirty-seven".