21752230667 has 2 divisors, whose sum is σ = 21752230668. Its totient is φ = 21752230666.

The previous prime is 21752230663. The next prime is 21752230723. The reversal of 21752230667 is 76603225712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21752230667 - 2² = 21752230663 is a prime.

It is not a weakly prime, because it can be changed into another prime (21752230663) 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, 10876115333 + 10876115334.

It is an arithmetic number, because the mean of its divisors is an integer number (10876115334).

Almost surely, 2^21752230667 is an apocalyptic number.

21752230667 is a deficient number, since it is larger than the sum of its proper divisors (1).

21752230667 is an equidigital number, since it uses as much as digits as its factorization.

21752230667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 21752230667 in words is "twenty-one billion, seven hundred fifty-two million, two hundred thirty thousand, six hundred sixty-seven".