20111000022 has 24 divisors (see below), whose sum is σ = 43580230200. Its totient is φ = 6702682560.

The previous prime is 20111000003. The next prime is 20111000027. The reversal of 20111000022 is 22000011102.

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 = 20110999968 and 20111000013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111000027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49729 + ... + 206627.

It is an arithmetic number, because the mean of its divisors is an integer number (1815842925).

Almost surely, 2^20111000022 is an apocalyptic number.

20111000022 is an abundant number, since it is smaller than the sum of its proper divisors (23469230178).

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

20111000022 is a wasteful number, since it uses less digits than its factorization.

20111000022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164028 (or 164025 counting only the distinct ones).

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

Adding to 20111000022 its reverse (22000011102), we get a palindrome (42111011124).

The spelling of 20111000022 in words is "twenty billion, one hundred eleven million, twenty-two", and thus it is an aban number.