13266740520 has 384 divisors, whose sum is σ = 49136855040. Its totient is φ = 3192618240.

The previous prime is 13266740491. The next prime is 13266740521. The reversal of 13266740520 is 2504766231.

13266740520 is a `hidden beast` number, since 1 + 3 + 2 + 66 + 74 + 0 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (13266740521) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17855269 + ... + 17856011.

It is an arithmetic number, because the mean of its divisors is an integer number (127960560).

Almost surely, 2^13266740520 is an apocalyptic number.

13266740520 is a gapful number since it is divisible by the number (10) 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 13266740520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24568427520).

13266740520 is an abundant number, since it is smaller than the sum of its proper divisors (35870114520).

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

13266740520 is a wasteful number, since it uses less digits than its factorization.

13266740520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 931 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 13266740520 in words is "thirteen billion, two hundred sixty-six million, seven hundred forty thousand, five hundred twenty".