20011023020 has 96 divisors (see below), whose sum is σ = 43609104000. Its totient is φ = 7707377664.

The previous prime is 20011023013. The next prime is 20011023059. The reversal of 20011023020 is 2032011002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20011022992 and 20011023010.

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, 44567756 + ... + 44568204.

It is an arithmetic number, because the mean of its divisors is an integer number (454261500).

Almost surely, 2^20011023020 is an apocalyptic number.

20011023020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20011023020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21804552000).

20011023020 is an abundant number, since it is smaller than the sum of its proper divisors (23598080980).

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

20011023020 is a wasteful number, since it uses less digits than its factorization.

20011023020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20011023020 its reverse (2032011002), we get a palindrome (22043034022).

The spelling of 20011023020 in words is "twenty billion, eleven million, twenty-three thousand, twenty".