20013111020 has 24 divisors (see below), whose sum is σ = 48031466784. Its totient is φ = 6861638016.

The previous prime is 20013111017. The next prime is 20013111029. The reversal of 20013111020 is 2011131002.

It is a super-2 number, since 2×20013111020² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20013110992 and 20013111010.

It is not an unprimeable number, because it can be changed into a prime (20013111029) 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, 71475257 + ... + 71475536.

It is an arithmetic number, because the mean of its divisors is an integer number (2001311116).

Almost surely, 2^20013111020 is an apocalyptic number.

20013111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013111020 is an abundant number, since it is smaller than the sum of its proper divisors (28018355764).

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

20013111020 is a wasteful number, since it uses less digits than its factorization.

20013111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142950809 (or 142950807 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20013111020 its reverse (2011131002), we get a palindrome (22024242022).

The spelling of 20013111020 in words is "twenty billion, thirteen million, one hundred eleven thousand, twenty".