13123816902 has 72 divisors (see below), whose sum is σ = 33131200752. Its totient is φ = 3743560800.

The previous prime is 13123816897. The next prime is 13123816903. The reversal of 13123816902 is 20961832131.

13123816902 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123816903) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 544752 + ... + 568332.

It is an arithmetic number, because the mean of its divisors is an integer number (460155566).

Almost surely, 2^13123816902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13123816902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16565600376).

13123816902 is an abundant number, since it is smaller than the sum of its proper divisors (20007383850).

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

13123816902 is a wasteful number, since it uses less digits than its factorization.

13123816902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24234 (or 24224 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 13123816902 in words is "thirteen billion, one hundred twenty-three million, eight hundred sixteen thousand, nine hundred two".