18906275 has 6 divisors (see below), whose sum is σ = 23443812. Its totient is φ = 15125000.

The previous prime is 18906271. The next prime is 18906301. The reversal of 18906275 is 57260981.

It is not a de Polignac number, because 18906275 - 2² = 18906271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18906271) 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 5 ways as a sum of consecutive naturals, for example, 378101 + ... + 378150.

It is an arithmetic number, because the mean of its divisors is an integer number (3907302).

Almost surely, 2^18906275 is an apocalyptic number.

18906275 is a deficient number, since it is larger than the sum of its proper divisors (4537537).

18906275 is an equidigital number, since it uses as much as digits as its factorization.

18906275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756261 (or 756256 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 18906275 is about 4348.1346575284. The cubic root of 18906275 is about 266.4006766133.

The spelling of 18906275 in words is "eighteen million, nine hundred six thousand, two hundred seventy-five".