18725435 has 4 divisors (see below), whose sum is σ = 22470528. Its totient is φ = 14980344.

The previous prime is 18725429. The next prime is 18725453. The reversal of 18725435 is 53452781.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53452781 = 2137 ⋅25013.

It is a cyclic number.

It is not a de Polignac number, because 18725435 - 2⁴ = 18725419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18725395 and 18725404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1872539 + ... + 1872548.

It is an arithmetic number, because the mean of its divisors is an integer number (5617632).

Almost surely, 2^18725435 is an apocalyptic number.

18725435 is a deficient number, since it is larger than the sum of its proper divisors (3745093).

18725435 is an equidigital number, since it uses as much as digits as its factorization.

18725435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745092.

The product of its digits is 33600, while the sum is 35.

The square root of 18725435 is about 4327.2895673851. The cubic root of 18725435 is about 265.5485728910.

The spelling of 18725435 in words is "eighteen million, seven hundred twenty-five thousand, four hundred thirty-five".