22021814 has 4 divisors (see below), whose sum is σ = 33032724. Its totient is φ = 11010906.

The previous prime is 22021807. The next prime is 22021819. The reversal of 22021814 is 41812022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505452 + ... + 5505455.

It is an arithmetic number, because the mean of its divisors is an integer number (8258181).

Almost surely, 2^22021814 is an apocalyptic number.

22021814 is a deficient number, since it is larger than the sum of its proper divisors (11010910).

22021814 is a wasteful number, since it uses less digits than its factorization.

22021814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11010909.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 22021814 is about 4692.7405638923. The cubic root of 22021814 is about 280.2965141182.

Adding to 22021814 its reverse (41812022), we get a palindrome (63833836).

The spelling of 22021814 in words is "twenty-two million, twenty-one thousand, eight hundred fourteen".