18440901 has 12 divisors (see below), whose sum is σ = 27012960. Its totient is φ = 12120360.

The previous prime is 18440899. The next prime is 18440909. The reversal of 18440901 is 10904481.

It is not a de Polignac number, because 18440901 - 2¹ = 18440899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18440909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13791 + ... + 15068.

It is an arithmetic number, because the mean of its divisors is an integer number (2251080).

Almost surely, 2^18440901 is an apocalyptic number.

It is an amenable number.

18440901 is a deficient number, since it is larger than the sum of its proper divisors (8572059).

18440901 is a wasteful number, since it uses less digits than its factorization.

18440901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28936 (or 28933 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18440901 is about 4294.2870188193. The cubic root of 18440901 is about 264.1966939809.

The spelling of 18440901 in words is "eighteen million, four hundred forty thousand, nine hundred one".