22126420 has 24 divisors (see below), whose sum is σ = 48069000. Its totient is φ = 8545152.

The previous prime is 22126397. The next prime is 22126427. The reversal of 22126420 is 2462122.

It can be written as a sum of positive squares in 4 ways, for example, as 6492304 + 15634116 = 2548^2 + 3954^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22126427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18495 + ... + 19654.

It is an arithmetic number, because the mean of its divisors is an integer number (2002875).

Almost surely, 2^22126420 is an apocalyptic number.

22126420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22126420 is an abundant number, since it is smaller than the sum of its proper divisors (25942580).

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

22126420 is a wasteful number, since it uses less digits than its factorization.

22126420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38187 (or 38185 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 22126420 is about 4703.8728724318. The cubic root of 22126420 is about 280.7396261735.

Adding to 22126420 its reverse (2462122), we get a palindrome (24588542).

The spelling of 22126420 in words is "twenty-two million, one hundred twenty-six thousand, four hundred twenty".