22018885 has 32 divisors (see below), whose sum is σ = 31737600. Its totient is φ = 14648256.

The previous prime is 22018883. The next prime is 22018907. The reversal of 22018885 is 58881022.

It is a happy number.

It is not a de Polignac number, because 22018885 - 2¹ = 22018883 is a prime.

It is a super-3 number, since 3×22018885³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22018885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22018883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63282 + ... + 63628.

It is an arithmetic number, because the mean of its divisors is an integer number (991800).

Almost surely, 2^22018885 is an apocalyptic number.

It is an amenable number.

22018885 is a deficient number, since it is larger than the sum of its proper divisors (9718715).

22018885 is an equidigital number, since it uses as much as digits as its factorization.

22018885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 22018885 is about 4692.4284757469. The cubic root of 22018885 is about 280.2840866695.

The spelling of 22018885 in words is "twenty-two million, eighteen thousand, eight hundred eighty-five".