18020277 has 24 divisors (see below), whose sum is σ = 28574208. Its totient is φ = 10852800.

The previous prime is 18020267. The next prime is 18020309. The reversal of 18020277 is 77202081.

It is not a de Polignac number, because 18020277 - 2¹⁴ = 18003893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18020277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18020267) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18433 + ... + 19385.

It is an arithmetic number, because the mean of its divisors is an integer number (1190592).

Almost surely, 2^18020277 is an apocalyptic number.

It is an amenable number.

18020277 is a deficient number, since it is larger than the sum of its proper divisors (10553931).

18020277 is a wasteful number, since it uses less digits than its factorization.

18020277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161 (or 1158 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 18020277 is about 4245.0296818750. The cubic root of 18020277 is about 262.1725113308.

The spelling of 18020277 in words is "eighteen million, twenty thousand, two hundred seventy-seven".