23521512013140 has 24 divisors (see below), whose sum is σ = 65860233636960. Its totient is φ = 6272403203488.

The previous prime is 23521512013099. The next prime is 23521512013141. The reversal of 23521512013140 is 4131021512532.

It is a happy number.

It is a super-3 number, since 3×23521512013140³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 23521512013098 and 23521512013107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23521512013141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196012600050 + ... + 196012600169.

It is an arithmetic number, because the mean of its divisors is an integer number (2744176401540).

Almost surely, 2^{23521512013140} is an apocalyptic number.

23521512013140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23521512013140 is an abundant number, since it is smaller than the sum of its proper divisors (42338721623820).

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

23521512013140 is a wasteful number, since it uses less digits than its factorization.

23521512013140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392025200231 (or 392025200229 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 23521512013140 its reverse (4131021512532), we get a palindrome (27652533525672).

The spelling of 23521512013140 in words is "twenty-three trillion, five hundred twenty-one billion, five hundred twelve million, thirteen thousand, one hundred forty".