18012907 has 6 divisors (see below), whose sum is σ = 19799444. Its totient is φ = 16375260.

The previous prime is 18012901. The next prime is 18012919. The reversal of 18012907 is 70921081.

It is a de Polignac number, because none of the positive numbers 2^k-18012907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18012901) 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, 74313 + ... + 74554.

Almost surely, 2^18012907 is an apocalyptic number.

18012907 is a deficient number, since it is larger than the sum of its proper divisors (1786537).

18012907 is a wasteful number, since it uses less digits than its factorization.

18012907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148889 (or 148878 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 18012907 is about 4244.1615190754. The cubic root of 18012907 is about 262.1367650271.

Adding to 18012907 its reverse (70921081), we get a palindrome (88933988).

The spelling of 18012907 in words is "eighteen million, twelve thousand, nine hundred seven".