20129392999 has 2 divisors, whose sum is σ = 20129393000. Its totient is φ = 20129392998.

The previous prime is 20129392937. The next prime is 20129393183. The reversal of 20129392999 is 99929392102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20129392999 - 2²⁷ = 19995175271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20129392919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10064696499 + 10064696500.

It is an arithmetic number, because the mean of its divisors is an integer number (10064696500).

Almost surely, 2^20129392999 is an apocalyptic number.

20129392999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20129392999 is an equidigital number, since it uses as much as digits as its factorization.

20129392999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1417176, while the sum is 55.

The spelling of 20129392999 in words is "twenty billion, one hundred twenty-nine million, three hundred ninety-two thousand, nine hundred ninety-nine".