20311120540 has 24 divisors (see below), whose sum is σ = 42656135760. Its totient is φ = 8123918208.

The previous prime is 20311120537. The next prime is 20311120553. The reversal of 20311120540 is 4502111302.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 460576 + ... + 502744.

It is an arithmetic number, because the mean of its divisors is an integer number (1777338990).

Almost surely, 2^20311120540 is an apocalyptic number.

20311120540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311120540 is an abundant number, since it is smaller than the sum of its proper divisors (22345015220).

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

20311120540 is a wasteful number, since it uses less digits than its factorization.

20311120540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66261 (or 66259 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 20311120540 its reverse (4502111302), we get a palindrome (24813231842).

The spelling of 20311120540 in words is "twenty billion, three hundred eleven million, one hundred twenty thousand, five hundred forty".