18674217 has 6 divisors (see below), whose sum is σ = 26973882. Its totient is φ = 12449472.

The previous prime is 18674213. The next prime is 18674219. The reversal of 18674217 is 71247681.

It can be written as a sum of positive squares in only one way, i.e., 16451136 + 2223081 = 4056^2 + 1491^2 .

It is not a de Polignac number, because 18674217 - 2² = 18674213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18674213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1037448 + ... + 1037465.

It is an arithmetic number, because the mean of its divisors is an integer number (4495647).

Almost surely, 2^18674217 is an apocalyptic number.

It is an amenable number.

18674217 is a deficient number, since it is larger than the sum of its proper divisors (8299665).

18674217 is a wasteful number, since it uses less digits than its factorization.

18674217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074919 (or 2074916 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 18674217 is about 4321.3674918942. The cubic root of 18674217 is about 265.3062414294.

It can be divided in two parts, 1867 and 4217, that added together give a square (6084 = 78²).

The spelling of 18674217 in words is "eighteen million, six hundred seventy-four thousand, two hundred seventeen".