20311041500 has 48 divisors (see below), whose sum is σ = 44373420000. Its totient is φ = 8121833600.

The previous prime is 20311041463. The next prime is 20311041581. The reversal of 20311041500 is 514011302.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2704751 + ... + 2712249.

It is an arithmetic number, because the mean of its divisors is an integer number (924446250).

Almost surely, 2^20311041500 is an apocalyptic number.

20311041500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311041500 is an abundant number, since it is smaller than the sum of its proper divisors (24062378500).

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

20311041500 is a wasteful number, since it uses less digits than its factorization.

20311041500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12935 (or 12923 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 20311041500 its reverse (514011302), we get a palindrome (20825052802).

The spelling of 20311041500 in words is "twenty billion, three hundred eleven million, forty-one thousand, five hundred".