22506019 has 2 divisors, whose sum is σ = 22506020. Its totient is φ = 22506018.

The previous prime is 22506017. The next prime is 22506023. The reversal of 22506019 is 91060522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22506019 - 2¹ = 22506017 is a prime.

It is a super-2 number, since 2×22506019² = 1013041782456722, which contains 22 as substring.

Together with 22506017, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22505984 and 22506002.

It is not a weakly prime, because it can be changed into another prime (22506017) 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, 11253009 + 11253010.

It is an arithmetic number, because the mean of its divisors is an integer number (11253010).

Almost surely, 2^22506019 is an apocalyptic number.

22506019 is a deficient number, since it is larger than the sum of its proper divisors (1).

22506019 is an equidigital number, since it uses as much as digits as its factorization.

22506019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 22506019 is about 4744.0509061350. The cubic root of 22506019 is about 282.3359801793.

The spelling of 22506019 in words is "twenty-two million, five hundred six thousand, nineteen".