18240867 has 6 divisors (see below), whose sum is σ = 26347932. Its totient is φ = 12160572.

The previous prime is 18240857. The next prime is 18240869. The reversal of 18240867 is 76804281.

It is not a de Polignac number, because 18240867 - 2¹⁰ = 18239843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18240869) 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, 1013373 + ... + 1013390.

It is an arithmetic number, because the mean of its divisors is an integer number (4391322).

Almost surely, 2^18240867 is an apocalyptic number.

18240867 is a deficient number, since it is larger than the sum of its proper divisors (8107065).

18240867 is a wasteful number, since it uses less digits than its factorization.

18240867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026769 (or 2026766 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 18240867 is about 4270.9328020937. The cubic root of 18240867 is about 263.2379452980.

The spelling of 18240867 in words is "eighteen million, two hundred forty thousand, eight hundred sixty-seven".