22506947 has 2 divisors, whose sum is σ = 22506948. Its totient is φ = 22506946.

The previous prime is 22506889. The next prime is 22506971. The reversal of 22506947 is 74960522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22506947 - 2¹⁴ = 22490563 is a prime.

It is not a weakly prime, because it can be changed into another prime (22506977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11253473 + 11253474.

It is an arithmetic number, because the mean of its divisors is an integer number (11253474).

Almost surely, 2^22506947 is an apocalyptic number.

22506947 is a deficient number, since it is larger than the sum of its proper divisors (1).

22506947 is an equidigital number, since it uses as much as digits as its factorization.

22506947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 22506947 is about 4744.1487118344. The cubic root of 22506947 is about 282.3398606847.

The spelling of 22506947 in words is "twenty-two million, five hundred six thousand, nine hundred forty-seven".