23220787 has 2 divisors, whose sum is σ = 23220788. Its totient is φ = 23220786.

The previous prime is 23220781. The next prime is 23220811. The reversal of 23220787 is 78702232.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23220787 is a prime.

It is not a weakly prime, because it can be changed into another prime (23220781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610393 + 11610394.

It is an arithmetic number, because the mean of its divisors is an integer number (11610394).

Almost surely, 2^23220787 is an apocalyptic number.

23220787 is a deficient number, since it is larger than the sum of its proper divisors (1).

23220787 is an equidigital number, since it uses as much as digits as its factorization.

23220787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 23220787 is about 4818.7951813705. The cubic root of 23220787 is about 285.2937854916.

The spelling of 23220787 in words is "twenty-three million, two hundred twenty thousand, seven hundred eighty-seven".