23505531213000 has 128 divisors (see below), whose sum is σ = 73384073118720. Its totient is φ = 6264140313600.

The previous prime is 23505531212983. The next prime is 23505531213013. The reversal of 23505531213000 is 31213550532.

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

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, 2200944 + ... + 7201056.

It is an arithmetic number, because the mean of its divisors is an integer number (573313071240).

Almost surely, 2^{23505531213000} is an apocalyptic number.

23505531213000 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 23505531213000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36692036559360).

23505531213000 is an abundant number, since it is smaller than the sum of its proper divisors (49878541905720).

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

23505531213000 is a wasteful number, since it uses less digits than its factorization.

23505531213000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001704 (or 5001690 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 30.

Adding to 23505531213000 its reverse (31213550532), we get a palindrome (23536744763532).

The spelling of 23505531213000 in words is "twenty-three trillion, five hundred five billion, five hundred thirty-one million, two hundred thirteen thousand".