20100020112 has 30 divisors (see below), whose sum is σ = 56252140022. Its totient is φ = 6700006656.

The previous prime is 20100020099. The next prime is 20100020117. The reversal of 20100020112 is 21102000102.

It can be written as a sum of positive squares in only one way, i.e., 15434583696 + 4665436416 = 124236^2 + 68304^2 .

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 = 20100020094 and 20100020103.

It is not an unprimeable number, because it can be changed into a prime (20100020117) 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, 69791593 + ... + 69791880.

Almost surely, 2^20100020112 is an apocalyptic number.

It is an amenable number.

20100020112 is an abundant number, since it is smaller than the sum of its proper divisors (36152119910).

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

20100020112 is a wasteful number, since it uses less digits than its factorization.

20100020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139583487 (or 139583478 counting only the distinct ones).

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

Adding to 20100020112 its reverse (21102000102), we get a palindrome (41202020214).

The spelling of 20100020112 in words is "twenty billion, one hundred million, twenty thousand, one hundred twelve".