22129423 has 2 divisors, whose sum is σ = 22129424. Its totient is φ = 22129422.

The previous prime is 22129417. The next prime is 22129501. The reversal of 22129423 is 32492122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22129423 is a prime.

It is a super-2 number, since 2×22129423² = 979422724625858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22129123) 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 as a sum of consecutive naturals, namely, 11064711 + 11064712.

It is an arithmetic number, because the mean of its divisors is an integer number (11064712).

Almost surely, 2^22129423 is an apocalyptic number.

22129423 is a deficient number, since it is larger than the sum of its proper divisors (1).

22129423 is an equidigital number, since it uses as much as digits as its factorization.

22129423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 22129423 is about 4704.1920666571. The cubic root of 22129423 is about 280.7523262693.

The spelling of 22129423 in words is "twenty-two million, one hundred twenty-nine thousand, four hundred twenty-three".