23402421042 has 256 divisors, whose sum is σ = 65792176128. Its totient is φ = 5353620480.

The previous prime is 23402421019. The next prime is 23402421043. The reversal of 23402421042 is 24012420432.

It is not an unprimeable number, because it can be changed into a prime (23402421043) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11776773 + ... + 11778759.

It is an arithmetic number, because the mean of its divisors is an integer number (257000688).

Almost surely, 2^23402421042 is an apocalyptic number.

23402421042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 23402421042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32896088064).

23402421042 is an abundant number, since it is smaller than the sum of its proper divisors (42389755086).

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

23402421042 is a wasteful number, since it uses less digits than its factorization.

23402421042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 23402421042 its reverse (24012420432), we get a palindrome (47414841474).

It can be divided in two parts, 23402 and 421042, that added together give a palindrome (444444).

The spelling of 23402421042 in words is "twenty-three billion, four hundred two million, four hundred twenty-one thousand, forty-two".