20331100111020 has 96 divisors (see below), whose sum is σ = 59927726880000. Its totient is φ = 5135893542144.

The previous prime is 20331100111019. The next prime is 20331100111051. The reversal of 20331100111020 is 2011100113302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14728282 + ... + 16049438.

It is an arithmetic number, because the mean of its divisors is an integer number (624247155000).

Almost surely, 2^{20331100111020} is an apocalyptic number.

20331100111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20331100111020 is an abundant number, since it is smaller than the sum of its proper divisors (39596626768980).

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

20331100111020 is a wasteful number, since it uses less digits than its factorization.

20331100111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334687 (or 1334685 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20331100111020 its reverse (2011100113302), we get a palindrome (22342200224322).

The spelling of 20331100111020 in words is "twenty trillion, three hundred thirty-one billion, one hundred million, one hundred eleven thousand, twenty".