22420818 has 24 divisors (see below), whose sum is σ = 55518528. Its totient is φ = 6405912.

The previous prime is 22420789. The next prime is 22420819. The reversal of 22420818 is 81802422.

It is a junction number, because it is equal to n+sod(n) for n = 22420791 and 22420800.

It is not an unprimeable number, because it can be changed into a prime (22420819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88846 + ... + 89097.

It is an arithmetic number, because the mean of its divisors is an integer number (2313272).

Almost surely, 2^22420818 is an apocalyptic number.

22420818 is an abundant number, since it is smaller than the sum of its proper divisors (33097710).

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

22420818 is a wasteful number, since it uses less digits than its factorization.

22420818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177958 (or 177955 counting only the distinct ones).

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

The square root of 22420818 is about 4735.0626183821. The cubic root of 22420818 is about 281.9792500199.

The spelling of 22420818 in words is "twenty-two million, four hundred twenty thousand, eight hundred eighteen".