20340234420 has 96 divisors (see below), whose sum is σ = 62186382720. Its totient is φ = 4926504960.

The previous prime is 20340234419. The next prime is 20340234449. The reversal of 20340234420 is 2443204302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 747616 + ... + 774344.

It is an arithmetic number, because the mean of its divisors is an integer number (647774820).

Almost surely, 2^20340234420 is an apocalyptic number.

20340234420 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 20340234420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31093191360).

20340234420 is an abundant number, since it is smaller than the sum of its proper divisors (41846148300).

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

20340234420 is a wasteful number, since it uses less digits than its factorization.

20340234420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27905 (or 27903 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20340234420 its reverse (2443204302), we get a palindrome (22783438722).

The spelling of 20340234420 in words is "twenty billion, three hundred forty million, two hundred thirty-four thousand, four hundred twenty".