20331123111020 has 24 divisors (see below), whose sum is σ = 42695691208800. Its totient is φ = 8132385877632.

The previous prime is 20331123110951. The next prime is 20331123111023. The reversal of 20331123111020 is 2011132113302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20331123110983 and 20331123111001.

It is not an unprimeable number, because it can be changed into a prime (20331123111023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1285400 + ... + 6504959.

It is an arithmetic number, because the mean of its divisors is an integer number (1778987133700).

Almost surely, 2^{20331123111020} is an apocalyptic number.

20331123111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20331123111020 is an abundant number, since it is smaller than the sum of its proper divisors (22364568097780).

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

20331123111020 is a wasteful number, since it uses less digits than its factorization.

20331123111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7920857 (or 7920855 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20331123111020 its reverse (2011132113302), we get a palindrome (22342255224322).

The spelling of 20331123111020 in words is "twenty trillion, three hundred thirty-one billion, one hundred twenty-three million, one hundred eleven thousand, twenty".