23421442434 has 64 divisors (see below), whose sum is σ = 52518896640. Its totient is φ = 6913670400.

The previous prime is 23421442417. The next prime is 23421442439. The reversal of 23421442434 is 43424412432.

It is a junction number, because it is equal to n+sod(n) for n = 23421442395 and 23421442404.

It is not an unprimeable number, because it can be changed into a prime (23421442439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322159 + ... + 388109.

It is an arithmetic number, because the mean of its divisors is an integer number (820607760).

Almost surely, 2^23421442434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23421442434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26259448320).

23421442434 is an abundant number, since it is smaller than the sum of its proper divisors (29097454206).

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

23421442434 is a wasteful number, since it uses less digits than its factorization.

23421442434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66155.

The product of its digits is 73728, while the sum is 33.

Adding to 23421442434 its reverse (43424412432), we get a palindrome (66845854866).

The spelling of 23421442434 in words is "twenty-three billion, four hundred twenty-one million, four hundred forty-two thousand, four hundred thirty-four".