20111022 has 12 divisors (see below), whose sum is σ = 43573920. Its totient is φ = 6703668.

The previous prime is 20111011. The next prime is 20111023. The reversal of 20111022 is 22011102.

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 = 20110995 and 20111013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111023) 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, 558622 + ... + 558657.

It is an arithmetic number, because the mean of its divisors is an integer number (3631160).

Almost surely, 2^20111022 is an apocalyptic number.

20111022 is an abundant number, since it is smaller than the sum of its proper divisors (23462898).

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

20111022 is a wasteful number, since it uses less digits than its factorization.

20111022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117287 (or 1117284 counting only the distinct ones).

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

The square root of 20111022 is about 4484.5314136485. The cubic root of 20111022 is about 271.9431019251.

Adding to 20111022 its reverse (22011102), we get a palindrome (42122124).

It can be divided in two parts, 2011102 and 2, that multiplied together give a palindrome (4022204).

The spelling of 20111022 in words is "twenty million, one hundred eleven thousand, twenty-two".