20988267807129 has 16 divisors (see below), whose sum is σ = 32045705137152. Its totient is φ = 11969452353168.

The previous prime is 20988267807113. The next prime is 20988267807131. The reversal of 20988267807129 is 92170876288902.

It is not a de Polignac number, because 20988267807129 - 2⁴ = 20988267807113 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20988267807149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 993469879 + ... + 993491004.

It is an arithmetic number, because the mean of its divisors is an integer number (2002856571072).

Almost surely, 2^{20988267807129} is an apocalyptic number.

It is an amenable number.

20988267807129 is a deficient number, since it is larger than the sum of its proper divisors (11057437330023).

20988267807129 is a wasteful number, since it uses less digits than its factorization.

20988267807129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986961396.

The product of its (nonzero) digits is 97542144, while the sum is 69.

The spelling of 20988267807129 in words is "twenty trillion, nine hundred eighty-eight billion, two hundred sixty-seven million, eight hundred seven thousand, one hundred twenty-nine".