20129535667 has 2 divisors, whose sum is σ = 20129535668. Its totient is φ = 20129535666.

The previous prime is 20129535659. The next prime is 20129535719. The reversal of 20129535667 is 76653592102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20129535667 - 2³ = 20129535659 is a prime.

It is not a weakly prime, because it can be changed into another prime (20129535067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10064767833 + 10064767834.

It is an arithmetic number, because the mean of its divisors is an integer number (10064767834).

Almost surely, 2^20129535667 is an apocalyptic number.

20129535667 is a deficient number, since it is larger than the sum of its proper divisors (1).

20129535667 is an equidigital number, since it uses as much as digits as its factorization.

20129535667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 20129535667 in words is "twenty billion, one hundred twenty-nine million, five hundred thirty-five thousand, six hundred sixty-seven".