20434823079 has 16 divisors (see below), whose sum is σ = 30448341504. Its totient is φ = 12082673600.

The previous prime is 20434823051. The next prime is 20434823083. The reversal of 20434823079 is 97032843402.

It is a cyclic number.

It is not a de Polignac number, because 20434823079 - 2²¹ = 20432725927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20434823079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434823029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7550319 + ... + 7553024.

It is an arithmetic number, because the mean of its divisors is an integer number (1903021344).

Almost surely, 2^20434823079 is an apocalyptic number.

20434823079 is a deficient number, since it is larger than the sum of its proper divisors (10013518425).

20434823079 is a wasteful number, since it uses less digits than its factorization.

20434823079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15103398.

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 20434823079 in words is "twenty billion, four hundred thirty-four million, eight hundred twenty-three thousand, seventy-nine".