18150913 has 4 divisors (see below), whose sum is σ = 19801008. Its totient is φ = 16500820.

The previous prime is 18150911. The next prime is 18150929. The reversal of 18150913 is 31905181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18150913 - 2¹ = 18150911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18150911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825031 + ... + 825052.

It is an arithmetic number, because the mean of its divisors is an integer number (4950252).

Almost surely, 2^18150913 is an apocalyptic number.

It is an amenable number.

18150913 is a deficient number, since it is larger than the sum of its proper divisors (1650095).

18150913 is a wasteful number, since it uses less digits than its factorization.

18150913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650094.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 18150913 is about 4260.3888320199. The cubic root of 18150913 is about 262.8045167482.

The spelling of 18150913 in words is "eighteen million, one hundred fifty thousand, nine hundred thirteen".