13320497520 has 320 divisors, whose sum is σ = 50308922880. Its totient is φ = 3212697600.

The previous prime is 13320497501. The next prime is 13320497551. The reversal of 13320497520 is 2579402331.

13320497520 is a `hidden beast` number, since 13 + 32 + 0 + 4 + 97 + 520 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5012032 + ... + 5014688.

It is an arithmetic number, because the mean of its divisors is an integer number (157215384).

Almost surely, 2^13320497520 is an apocalyptic number.

13320497520 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 13320497520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25154461440).

13320497520 is an abundant number, since it is smaller than the sum of its proper divisors (36988425360).

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

13320497520 is a wasteful number, since it uses less digits than its factorization.

13320497520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901 (or 2889 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

Adding to 13320497520 its reverse (2579402331), we get a palindrome (15899899851).

The spelling of 13320497520 in words is "thirteen billion, three hundred twenty million, four hundred ninety-seven thousand, five hundred twenty".