22045420 has 12 divisors (see below), whose sum is σ = 46295424. Its totient is φ = 8818160.

The previous prime is 22045367. The next prime is 22045427. The reversal of 22045420 is 2454022.

It is not an unprimeable number, because it can be changed into a prime (22045427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551116 + ... + 551155.

It is an arithmetic number, because the mean of its divisors is an integer number (3857952).

Almost surely, 2^22045420 is an apocalyptic number.

22045420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22045420 is an abundant number, since it is smaller than the sum of its proper divisors (24250004).

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

22045420 is a wasteful number, since it uses less digits than its factorization.

22045420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102280 (or 1102278 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 22045420 is about 4695.2550516452. The cubic root of 22045420 is about 280.3966317667.

Adding to 22045420 its reverse (2454022), we get a palindrome (24499442).

The spelling of 22045420 in words is "twenty-two million, forty-five thousand, four hundred twenty".