20102111190 has 96 divisors (see below), whose sum is σ = 59888664576. Its totient is φ = 4582716480.

The previous prime is 20102111189. The next prime is 20102111257. The reversal of 20102111190 is 9111120102.

It is a happy number.

It is a super-2 number, since 2×20102111190² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 199635 + ... + 282945.

It is an arithmetic number, because the mean of its divisors is an integer number (623840256).

Almost surely, 2^20102111190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20102111190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29944332288).

20102111190 is an abundant number, since it is smaller than the sum of its proper divisors (39786553386).

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

20102111190 is a wasteful number, since it uses less digits than its factorization.

20102111190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83714 (or 83711 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 20102111190 its reverse (9111120102), we get a palindrome (29213231292).

The spelling of 20102111190 in words is "twenty billion, one hundred two million, one hundred eleven thousand, one hundred ninety".