18850909 has 16 divisors (see below), whose sum is σ = 24886656. Its totient is φ = 13824000.

The previous prime is 18850903. The next prime is 18850921. The reversal of 18850909 is 90905881.

It is a cyclic number.

It is not a de Polignac number, because 18850909 - 2¹¹ = 18848861 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 (18850903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5892 + ... + 8509.

It is an arithmetic number, because the mean of its divisors is an integer number (1555416).

Almost surely, 2^18850909 is an apocalyptic number.

It is an amenable number.

18850909 is a deficient number, since it is larger than the sum of its proper divisors (6035747).

18850909 is a wasteful number, since it uses less digits than its factorization.

18850909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14436.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 18850909 is about 4341.7633514507. The cubic root of 18850909 is about 266.1403757155.

The spelling of 18850909 in words is "eighteen million, eight hundred fifty thousand, nine hundred nine".