20011010022 has 48 divisors (see below), whose sum is σ = 45304197120. Its totient is φ = 6371590896.

The previous prime is 20011010021. The next prime is 20011010023. The reversal of 20011010022 is 22001011002.

It is an interprime number because it is at equal distance from previous prime (20011010021) and next prime (20011010023).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20011009986 and 20011010013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011010021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 273243 + ... + 338649.

It is an arithmetic number, because the mean of its divisors is an integer number (943837440).

Almost surely, 2^20011010022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20011010022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22652098560).

20011010022 is an abundant number, since it is smaller than the sum of its proper divisors (25293187098).

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

20011010022 is a wasteful number, since it uses less digits than its factorization.

20011010022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66177 (or 66174 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20011010022 its reverse (22001011002), we get a palindrome (42012021024).

The spelling of 20011010022 in words is "twenty billion, eleven million, ten thousand, twenty-two".