20043351342 has 80 divisors (see below), whose sum is σ = 51720147072. Its totient is φ = 5682914640.

The previous prime is 20043351259. The next prime is 20043351343. The reversal of 20043351342 is 24315334002.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043351343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 81093 + ... + 216015.

Almost surely, 2^20043351342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20043351342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25860073536).

20043351342 is an abundant number, since it is smaller than the sum of its proper divisors (31676795730).

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

20043351342 is a wasteful number, since it uses less digits than its factorization.

20043351342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135075 (or 135066 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 20043351342 its reverse (24315334002), we get a palindrome (44358685344).

The spelling of 20043351342 in words is "twenty billion, forty-three million, three hundred fifty-one thousand, three hundred forty-two".