20112102 has 24 divisors (see below), whose sum is σ = 43658784. Its totient is φ = 6691344.

The previous prime is 20112073. The next prime is 20112107. The reversal of 20112102 is 20121102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17683 + ... + 18785.

It is an arithmetic number, because the mean of its divisors is an integer number (1819116).

Almost surely, 2^20112102 is an apocalyptic number.

20112102 is an abundant number, since it is smaller than the sum of its proper divisors (23546682).

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

20112102 is a wasteful number, since it uses less digits than its factorization.

20112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124 (or 2121 counting only the distinct ones).

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

The square root of 20112102 is about 4484.6518259504. The cubic root of 20112102 is about 271.9479697913.

Adding to 20112102 its reverse (20121102), we get a palindrome (40233204).

The spelling of 20112102 in words is "twenty million, one hundred twelve thousand, one hundred two".