13021783680 has 256 divisors, whose sum is σ = 43053171840. Its totient is φ = 3345285120.

The previous prime is 13021783633. The next prime is 13021783681. The reversal of 13021783680 is 8638712031.

It is not an unprimeable number, because it can be changed into a prime (13021783681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6532764 + ... + 6534756.

Almost surely, 2^13021783680 is an apocalyptic number.

13021783680 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 13021783680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21526585920).

13021783680 is an abundant number, since it is smaller than the sum of its proper divisors (30031388160).

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

13021783680 is a wasteful number, since it uses less digits than its factorization.

13021783680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 13021783680 in words is "thirteen billion, twenty-one million, seven hundred eighty-three thousand, six hundred eighty".