23817020136 has 128 divisors (see below), whose sum is σ = 73493118720. Its totient is φ = 6263414784.

The previous prime is 23817020119. The next prime is 23817020147. The reversal of 23817020136 is 63102071832.

It is a junction number, because it is equal to n+sod(n) for n = 23817020097 and 23817020106.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 755506 + ... + 786398.

It is an arithmetic number, because the mean of its divisors is an integer number (574164990).

Almost surely, 2^23817020136 is an apocalyptic number.

23817020136 is a gapful number since it is divisible by the number (26) 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 23817020136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36746559360).

23817020136 is an abundant number, since it is smaller than the sum of its proper divisors (49676098584).

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

23817020136 is a wasteful number, since it uses less digits than its factorization.

23817020136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31275 (or 31271 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

Adding to 23817020136 its reverse (63102071832), we get a palindrome (86919091968).

The spelling of 23817020136 in words is "twenty-three billion, eight hundred seventeen million, twenty thousand, one hundred thirty-six".