22820429 has 2 divisors, whose sum is σ = 22820430. Its totient is φ = 22820428.

The previous prime is 22820423. The next prime is 22820431. The reversal of 22820429 is 92402822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14235529 + 8584900 = 3773^2 + 2930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22820429 is a prime.

Together with 22820431, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22820423) 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, 11410214 + 11410215.

It is an arithmetic number, because the mean of its divisors is an integer number (11410215).

Almost surely, 2^22820429 is an apocalyptic number.

It is an amenable number.

22820429 is a deficient number, since it is larger than the sum of its proper divisors (1).

22820429 is an equidigital number, since it uses as much as digits as its factorization.

22820429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 22820429 is about 4777.0732671794. The cubic root of 22820429 is about 283.6446532671.

The spelling of 22820429 in words is "twenty-two million, eight hundred twenty thousand, four hundred twenty-nine".