20031311240 has 64 divisors (see below), whose sum is σ = 45420652800. Its totient is φ = 7950431232.

The previous prime is 20031311239. The next prime is 20031311291. The reversal of 20031311240 is 4211313002.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4685744 + ... + 4690016.

It is an arithmetic number, because the mean of its divisors is an integer number (709697700).

Almost surely, 2^20031311240 is an apocalyptic number.

20031311240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031311240 is an abundant number, since it is smaller than the sum of its proper divisors (25389341560).

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

20031311240 is a wasteful number, since it uses less digits than its factorization.

20031311240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5166 (or 5162 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20031311240 its reverse (4211313002), we get a palindrome (24242624242).

The spelling of 20031311240 in words is "twenty billion, thirty-one million, three hundred eleven thousand, two hundred forty".