18745913 has 8 divisors (see below), whose sum is σ = 19773600. Its totient is φ = 17722368.

The previous prime is 18745901. The next prime is 18745921. The reversal of 18745913 is 31954781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18745913 - 2¹⁰ = 18744889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18745963) 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 7 ways as a sum of consecutive naturals, for example, 13970 + ... + 15252.

It is an arithmetic number, because the mean of its divisors is an integer number (2471700).

Almost surely, 2^18745913 is an apocalyptic number.

It is an amenable number.

18745913 is a deficient number, since it is larger than the sum of its proper divisors (1027687).

18745913 is a wasteful number, since it uses less digits than its factorization.

18745913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071.

The product of its digits is 30240, while the sum is 38.

The square root of 18745913 is about 4329.6550670925. The cubic root of 18745913 is about 265.6453382905.

The spelling of 18745913 in words is "eighteen million, seven hundred forty-five thousand, nine hundred thirteen".