23513203140 has 384 divisors, whose sum is σ = 80301957120. Its totient is φ = 5025411072.

The previous prime is 23513203139. The next prime is 23513203141. The reversal of 23513203140 is 4130231532.

It is an interprime number because it is at equal distance from previous prime (23513203139) and next prime (23513203141).

It is a self number, because there is not a number n which added to its sum of digits gives 23513203140.

It is not an unprimeable number, because it can be changed into a prime (23513203141) 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, 144252699 + ... + 144252861.

It is an arithmetic number, because the mean of its divisors is an integer number (209119680).

Almost surely, 2^23513203140 is an apocalyptic number.

23513203140 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 23513203140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40150978560).

23513203140 is an abundant number, since it is smaller than the sum of its proper divisors (56788753980).

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

23513203140 is a wasteful number, since it uses less digits than its factorization.

23513203140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 23513203140 its reverse (4130231532), we get a palindrome (27643434672).

The spelling of 23513203140 in words is "twenty-three billion, five hundred thirteen million, two hundred three thousand, one hundred forty".