22188042 has 24 divisors (see below), whose sum is σ = 49098816. Its totient is φ = 7238376.

The previous prime is 22188007. The next prime is 22188053. The reversal of 22188042 is 24088122.

It is a Cunningham number, because it is equal to 281³+1.

It is a junction number, because it is equal to n+sod(n) for n = 22187997 and 22188015.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12268 + ... + 13959.

It is an arithmetic number, because the mean of its divisors is an integer number (2045784).

Almost surely, 2^22188042 is an apocalyptic number.

22188042 is an abundant number, since it is smaller than the sum of its proper divisors (26910774).

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

22188042 is a wasteful number, since it uses less digits than its factorization.

22188042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26282 (or 26279 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 22188042 is about 4710.4184527492. The cubic root of 22188042 is about 281.0000042215. Note that the first 5 decimals are identical.

The spelling of 22188042 in words is "twenty-two million, one hundred eighty-eight thousand, forty-two".