18621275 has 12 divisors (see below), whose sum is σ = 23250000. Its totient is φ = 14794080.

The previous prime is 18621271. The next prime is 18621289. The reversal of 18621275 is 57212681.

It is not a de Polignac number, because 18621275 - 2² = 18621271 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18621271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1226 + ... + 6224.

It is an arithmetic number, because the mean of its divisors is an integer number (1937500).

Almost surely, 2^18621275 is an apocalyptic number.

18621275 is a deficient number, since it is larger than the sum of its proper divisors (4628725).

18621275 is a wasteful number, since it uses less digits than its factorization.

18621275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5158 (or 5153 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 18621275 is about 4315.2375369150. The cubic root of 18621275 is about 265.0552869102.

The spelling of 18621275 in words is "eighteen million, six hundred twenty-one thousand, two hundred seventy-five".