22505929 has 2 divisors, whose sum is σ = 22505930. Its totient is φ = 22505928.

The previous prime is 22505927. The next prime is 22505933. The reversal of 22505929 is 92950522.

22505929 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22278400 + 227529 = 4720^2 + 477^2 .

It is a cyclic number.

It is not a de Polignac number, because 22505929 - 2¹ = 22505927 is a prime.

Together with 22505927, it forms a pair of twin primes.

It is equal to p_1418992 and since 22505929 and 1418992 have the same sum of digits, it is a Honaker prime.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 22505894 and 22505903.

It is not a weakly prime, because it can be changed into another prime (22505927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11252964 + 11252965.

It is an arithmetic number, because the mean of its divisors is an integer number (11252965).

Almost surely, 2^22505929 is an apocalyptic number.

It is an amenable number.

22505929 is a deficient number, since it is larger than the sum of its proper divisors (1).

22505929 is an equidigital number, since it uses as much as digits as its factorization.

22505929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 22505929 is about 4744.0414205612. The cubic root of 22505929 is about 282.3356038315.

The spelling of 22505929 in words is "twenty-two million, five hundred five thousand, nine hundred twenty-nine".