20112243102 has 48 divisors (see below), whose sum is σ = 50861371392. Its totient is φ = 5624090640.

The previous prime is 20112243097. The next prime is 20112243103. The reversal of 20112243102 is 20134221102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112243103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1692174 + ... + 1704017.

It is an arithmetic number, because the mean of its divisors is an integer number (1059611904).

Almost surely, 2^20112243102 is an apocalyptic number.

20112243102 is an abundant number, since it is smaller than the sum of its proper divisors (30749128290).

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

20112243102 is a wasteful number, since it uses less digits than its factorization.

20112243102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3396253 (or 3396250 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20112243102 its reverse (20134221102), we get a palindrome (40246464204).

The spelling of 20112243102 in words is "twenty billion, one hundred twelve million, two hundred forty-three thousand, one hundred two".