20112322340 has 144 divisors (see below), whose sum is σ = 47574085104. Its totient is φ = 7134167040.

The previous prime is 20112322337. The next prime is 20112322357. The reversal of 20112322340 is 4322321102.

It can be written as a sum of positive squares in 8 ways, for example, as 823001344 + 19289320996 = 28688^2 + 138886^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 29884244 + ... + 29884916.

It is an arithmetic number, because the mean of its divisors is an integer number (330375591).

Almost surely, 2^20112322340 is an apocalyptic number.

20112322340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20112322340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23787042552).

20112322340 is an abundant number, since it is smaller than the sum of its proper divisors (27461762764).

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

20112322340 is a wasteful number, since it uses less digits than its factorization.

20112322340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20112322340 its reverse (4322321102), we get a palindrome (24434643442).

The spelling of 20112322340 in words is "twenty billion, one hundred twelve million, three hundred twenty-two thousand, three hundred forty".