18227913 has 16 divisors (see below), whose sum is σ = 26588352. Its totient is φ = 11016000.

The previous prime is 18227887. The next prime is 18227933. The reversal of 18227913 is 31972281.

It is not a de Polignac number, because 18227913 - 2⁶ = 18227849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (18227933) 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, 17343 + ... + 18363.

It is an arithmetic number, because the mean of its divisors is an integer number (1661772).

Almost surely, 2^18227913 is an apocalyptic number.

It is an amenable number.

18227913 is a deficient number, since it is larger than the sum of its proper divisors (8360439).

18227913 is a wasteful number, since it uses less digits than its factorization.

18227913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576.

The product of its digits is 6048, while the sum is 33.

The square root of 18227913 is about 4269.4160022186. The cubic root of 18227913 is about 263.1756165378.

The spelling of 18227913 in words is "eighteen million, two hundred twenty-seven thousand, nine hundred thirteen".