20423041420340 has 144 divisors (see below), whose sum is σ = 48759872526288. Its totient is φ = 7141949687808.

The previous prime is 20423041420337. The next prime is 20423041420403. The reversal of 20423041420340 is 4302414032402.

It can be written as a sum of positive squares in 8 ways, for example, as 690913388944 + 19732128031396 = 831212^2 + 4442086^2 .

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, 361614344 + ... + 361670816.

It is an arithmetic number, because the mean of its divisors is an integer number (338610225877).

Almost surely, 2^{20423041420340} is an apocalyptic number.

20423041420340 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 20423041420340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24379936263144).

20423041420340 is an abundant number, since it is smaller than the sum of its proper divisors (28336831105948).

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

20423041420340 is a wasteful number, since it uses less digits than its factorization.

20423041420340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60386 (or 60365 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 20423041420340 its reverse (4302414032402), we get a palindrome (24725455452742).

The spelling of 20423041420340 in words is "twenty trillion, four hundred twenty-three billion, forty-one million, four hundred twenty thousand, three hundred forty".