20312117834 has 16 divisors (see below), whose sum is σ = 31798379520. Its totient is φ = 9712810800.

The previous prime is 20312117831. The next prime is 20312117849. The reversal of 20312117834 is 43871121302.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20312117834.

It is not an unprimeable number, because it can be changed into a prime (20312117831) 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, 254807 + ... + 324885.

It is an arithmetic number, because the mean of its divisors is an integer number (1987398720).

Almost surely, 2^20312117834 is an apocalyptic number.

20312117834 is a deficient number, since it is larger than the sum of its proper divisors (11486261686).

20312117834 is a wasteful number, since it uses less digits than its factorization.

20312117834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76405.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 20312117834 in words is "twenty billion, three hundred twelve million, one hundred seventeen thousand, eight hundred thirty-four".