13229817520 has 80 divisors (see below), whose sum is σ = 32609573568. Its totient is φ = 4974387200.

The previous prime is 13229817509. The next prime is 13229817533. The reversal of 13229817520 is 2571892231.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×13229817520² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1159845 + ... + 1171195.

Almost surely, 2^13229817520 is an apocalyptic number.

13229817520 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 13229817520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16304786784).

13229817520 is an abundant number, since it is smaller than the sum of its proper divisors (19379756048).

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

13229817520 is a wasteful number, since it uses less digits than its factorization.

13229817520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12238 (or 12232 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 13229817520 in words is "thirteen billion, two hundred twenty-nine million, eight hundred seventeen thousand, five hundred twenty".