18242407 has 6 divisors (see below), whose sum is σ = 18434688. Its totient is φ = 18051012.

The previous prime is 18242359. The next prime is 18242423. The reversal of 18242407 is 70424281.

It is not a de Polignac number, because 18242407 - 2¹¹ = 18240359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18242437) 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, 47944 + ... + 48322.

It is an arithmetic number, because the mean of its divisors is an integer number (3072448).

Almost surely, 2^18242407 is an apocalyptic number.

18242407 is a deficient number, since it is larger than the sum of its proper divisors (192281).

18242407 is an frugal number, since it uses more digits than its factorization.

18242407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 18242407 is about 4271.1130867726. The cubic root of 18242407 is about 263.2453531153.

Adding to 18242407 its reverse (70424281), we get a palindrome (88666688).

It can be divided in two parts, 1 and 8242407, that added together give a cube (8242408 = 202³).

The spelling of 18242407 in words is "eighteen million, two hundred forty-two thousand, four hundred seven".