20011100022 has 12 divisors (see below), whose sum is σ = 43357383420. Its totient is φ = 6670366668.

The previous prime is 20011099981. The next prime is 20011100023. The reversal of 20011100022 is 22000111002.

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 = 20011099977 and 20011100013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011100023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555863872 + ... + 555863907.

It is an arithmetic number, because the mean of its divisors is an integer number (3613115285).

Almost surely, 2^20011100022 is an apocalyptic number.

20011100022 is an abundant number, since it is smaller than the sum of its proper divisors (23346283398).

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

20011100022 is a wasteful number, since it uses less digits than its factorization.

20011100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111727787 (or 1111727784 counting only the distinct ones).

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

Adding to 20011100022 its reverse (22000111002), we get a palindrome (42011211024).

The spelling of 20011100022 in words is "twenty billion, eleven million, one hundred thousand, twenty-two".