18216927 has 8 divisors (see below), whose sum is σ = 26988080. Its totient is φ = 12144600.

The previous prime is 18216917. The next prime is 18216941. The reversal of 18216927 is 72961281.

It is not a de Polignac number, because 18216927 - 2⁷ = 18216799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18216891 and 18216900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18216917) 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, 337324 + ... + 337377.

It is an arithmetic number, because the mean of its divisors is an integer number (3373510).

Almost surely, 2^18216927 is an apocalyptic number.

18216927 is a deficient number, since it is larger than the sum of its proper divisors (8771153).

18216927 is an equidigital number, since it uses as much as digits as its factorization.

18216927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674710 (or 674704 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 18216927 is about 4268.1292154760. The cubic root of 18216927 is about 263.1227337535.

The spelling of 18216927 in words is "eighteen million, two hundred sixteen thousand, nine hundred twenty-seven".