20000112990 has 192 divisors, whose sum is σ = 59292753408. Its totient is φ = 4280728320.

The previous prime is 20000112989. The next prime is 20000113009. The reversal of 20000112990 is 9921100002.

It is a super-2 number, since 2×20000112990² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20000112990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1076157 + ... + 1094583.

It is an arithmetic number, because the mean of its divisors is an integer number (308816424).

Almost surely, 2^20000112990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20000112990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29646376704).

20000112990 is an abundant number, since it is smaller than the sum of its proper divisors (39292640418).

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

20000112990 is a wasteful number, since it uses less digits than its factorization.

20000112990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18495 (or 18484 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

Adding to 20000112990 its reverse (9921100002), we get a palindrome (29921212992).

It can be divided in two parts, 2000011 and 2990, that added together give a triangular number (2003001 = T₂₀₀₁).

The spelling of 20000112990 in words is "twenty billion, one hundred twelve thousand, nine hundred ninety".