22540218 has 8 divisors (see below), whose sum is σ = 45080448. Its totient is φ = 7513404.

The previous prime is 22540169. The next prime is 22540237. The reversal of 22540218 is 81204522.

It is a sphenic number, since it is the product of 3 distinct primes.

22540218 is an admirable number.

It is a super-2 number, since 2×22540218² = 1016122854975048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1878346 + ... + 1878357.

It is an arithmetic number, because the mean of its divisors is an integer number (5635056).

Almost surely, 2^22540218 is an apocalyptic number.

22540218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22540218 is a wasteful number, since it uses less digits than its factorization.

22540218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3756708.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 22540218 is about 4747.6539469511. The cubic root of 22540218 is about 282.4789155956.

The spelling of 22540218 in words is "twenty-two million, five hundred forty thousand, two hundred eighteen".