22508429 has 2 divisors, whose sum is σ = 22508430. Its totient is φ = 22508428.

The previous prime is 22508399. The next prime is 22508471. The reversal of 22508429 is 92480522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20043529 + 2464900 = 4477^2 + 1570^2 .

It is a cyclic number.

It is not a de Polignac number, because 22508429 - 2²⁰ = 21459853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22508395 and 22508404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22508929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11254214 + 11254215.

It is an arithmetic number, because the mean of its divisors is an integer number (11254215).

Almost surely, 2^22508429 is an apocalyptic number.

It is an amenable number.

22508429 is a deficient number, since it is larger than the sum of its proper divisors (1).

22508429 is an equidigital number, since it uses as much as digits as its factorization.

22508429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 22508429 is about 4744.3049016689. The cubic root of 22508429 is about 282.3460575638.

The spelling of 22508429 in words is "twenty-two million, five hundred eight thousand, four hundred twenty-nine".