20311703760 has 80 divisors (see below), whose sum is σ = 66280311360. Its totient is φ = 5131376640.

The previous prime is 20311703759. The next prime is 20311703771. The reversal of 20311703760 is 6730711302.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2222601 + ... + 2231720.

It is an arithmetic number, because the mean of its divisors is an integer number (828503892).

Almost surely, 2^20311703760 is an apocalyptic number.

20311703760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311703760 is an abundant number, since it is smaller than the sum of its proper divisors (45968607600).

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

20311703760 is a wasteful number, since it uses less digits than its factorization.

20311703760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454356 (or 4454350 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 30.

The spelling of 20311703760 in words is "twenty billion, three hundred eleven million, seven hundred three thousand, seven hundred sixty".