20311878798 has 48 divisors (see below), whose sum is σ = 46041742656. Its totient is φ = 6464935680.

The previous prime is 20311878791. The next prime is 20311878823. The reversal of 20311878798 is 89787811302.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311878791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 258111 + ... + 327482.

It is an arithmetic number, because the mean of its divisors is an integer number (959202972).

Almost surely, 2^20311878798 is an apocalyptic number.

20311878798 is an abundant number, since it is smaller than the sum of its proper divisors (25729863858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20311878798 is a wasteful number, since it uses less digits than its factorization.

20311878798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585689 (or 585686 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 54.

The spelling of 20311878798 in words is "twenty billion, three hundred eleven million, eight hundred seventy-eight thousand, seven hundred ninety-eight".