18022477 has 8 divisors (see below), whose sum is σ = 19692000. Its totient is φ = 16358160.

The previous prime is 18022471. The next prime is 18022481. The reversal of 18022477 is 77422081.

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 18022477 - 2¹⁵ = 17989709 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 (18022471) 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, 11274 + ... + 12772.

It is an arithmetic number, because the mean of its divisors is an integer number (2461500).

Almost surely, 2^18022477 is an apocalyptic number.

It is an amenable number.

18022477 is a deficient number, since it is larger than the sum of its proper divisors (1669523).

18022477 is a wasteful number, since it uses less digits than its factorization.

18022477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 18022477 is about 4245.2888005411. The cubic root of 18022477 is about 262.1831799803.

The spelling of 18022477 in words is "eighteen million, twenty-two thousand, four hundred seventy-seven".