18869213 has 8 divisors (see below), whose sum is σ = 20618976. Its totient is φ = 17125200.

The previous prime is 18869209. The next prime is 18869237. The reversal of 18869213 is 31296881.

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 18869213 - 2² = 18869209 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 (18869243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8378 + ... + 10388.

It is an arithmetic number, because the mean of its divisors is an integer number (2577372).

Almost surely, 2^18869213 is an apocalyptic number.

It is an amenable number.

18869213 is a deficient number, since it is larger than the sum of its proper divisors (1749763).

18869213 is a wasteful number, since it uses less digits than its factorization.

18869213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875.

The product of its digits is 20736, while the sum is 38.

The square root of 18869213 is about 4343.8707393292. The cubic root of 18869213 is about 266.2264875238.

The spelling of 18869213 in words is "eighteen million, eight hundred sixty-nine thousand, two hundred thirteen".