20344800667 has 2 divisors, whose sum is σ = 20344800668. Its totient is φ = 20344800666.

The previous prime is 20344800659. The next prime is 20344800689. The reversal of 20344800667 is 76600844302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20344800667 - 2³ = 20344800659 is a prime.

It is not a weakly prime, because it can be changed into another prime (20344800607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172400333 + 10172400334.

It is an arithmetic number, because the mean of its divisors is an integer number (10172400334).

Almost surely, 2^20344800667 is an apocalyptic number.

20344800667 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344800667 is an equidigital number, since it uses as much as digits as its factorization.

20344800667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 20344800667 in words is "twenty billion, three hundred forty-four million, eight hundred thousand, six hundred sixty-seven".