20842080929 has 4 divisors (see below), whose sum is σ = 20925117360. Its totient is φ = 20759044500.

The previous prime is 20842080899. The next prime is 20842080991. The reversal of 20842080929 is 92908024802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20842080929 - 2²⁴ = 20825303713 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 20842080929.

It is not an unprimeable number, because it can be changed into a prime (20842080629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41517839 + ... + 41518340.

It is an arithmetic number, because the mean of its divisors is an integer number (5231279340).

Almost surely, 2^20842080929 is an apocalyptic number.

It is an amenable number.

20842080929 is a deficient number, since it is larger than the sum of its proper divisors (83036431).

20842080929 is an equidigital number, since it uses as much as digits as its factorization.

20842080929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83036430.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 20842080929 in words is "twenty billion, eight hundred forty-two million, eighty thousand, nine hundred twenty-nine".