20129147999 has 8 divisors (see below), whose sum is σ = 20686056960. Its totient is φ = 19572916896.

The previous prime is 20129147977. The next prime is 20129148019. The reversal of 20129147999 is 99974192102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20129147999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20129147999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20129147299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108959 + ... + 228320.

It is an arithmetic number, because the mean of its divisors is an integer number (2585757120).

Almost surely, 2^20129147999 is an apocalyptic number.

20129147999 is a deficient number, since it is larger than the sum of its proper divisors (556908961).

20129147999 is a wasteful number, since it uses less digits than its factorization.

20129147999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338929.

The product of its (nonzero) digits is 734832, while the sum is 53.

The spelling of 20129147999 in words is "twenty billion, one hundred twenty-nine million, one hundred forty-seven thousand, nine hundred ninety-nine".