22403947 has 2 divisors, whose sum is σ = 22403948. Its totient is φ = 22403946.

The previous prime is 22403923. The next prime is 22403951. The reversal of 22403947 is 74930422.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22403947 - 2¹⁵ = 22371179 is a prime.

It is not a weakly prime, because it can be changed into another prime (22403987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11201973 + 11201974.

It is an arithmetic number, because the mean of its divisors is an integer number (11201974).

Almost surely, 2^22403947 is an apocalyptic number.

22403947 is a deficient number, since it is larger than the sum of its proper divisors (1).

22403947 is an equidigital number, since it uses as much as digits as its factorization.

22403947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 22403947 is about 4733.2807860933. The cubic root of 22403947 is about 281.9085052674.

The spelling of 22403947 in words is "twenty-two million, four hundred three thousand, nine hundred forty-seven".