20205073834 has 16 divisors (see below), whose sum is σ = 33831753120. Its totient is φ = 8970539760.

The previous prime is 20205073831. The next prime is 20205073853. The reversal of 20205073834 is 43837050202.

It is a self number, because there is not a number n which added to its sum of digits gives 20205073834.

It is not an unprimeable number, because it can be changed into a prime (20205073831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10678269 + ... + 10680160.

It is an arithmetic number, because the mean of its divisors is an integer number (2114484570).

Almost surely, 2^20205073834 is an apocalyptic number.

20205073834 is a deficient number, since it is larger than the sum of its proper divisors (13626679286).

20205073834 is a wasteful number, since it uses less digits than its factorization.

20205073834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21358485.

The product of its (nonzero) digits is 40320, while the sum is 34.

The spelling of 20205073834 in words is "twenty billion, two hundred five million, seventy-three thousand, eight hundred thirty-four".