23420121340 has 144 divisors (see below), whose sum is σ = 63270202464. Its totient is φ = 7199539200.

The previous prime is 23420121337. The next prime is 23420121341. The reversal of 23420121340 is 4312102432.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23420121341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 772060 + ... + 801820.

It is an arithmetic number, because the mean of its divisors is an integer number (439376406).

Almost surely, 2^23420121340 is an apocalyptic number.

23420121340 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 23420121340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31635101232).

23420121340 is an abundant number, since it is smaller than the sum of its proper divisors (39850081124).

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

23420121340 is a wasteful number, since it uses less digits than its factorization.

23420121340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29868 (or 29859 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 23420121340 its reverse (4312102432), we get a palindrome (27732223772).

The spelling of 23420121340 in words is "twenty-three billion, four hundred twenty million, one hundred twenty-one thousand, three hundred forty".