13321644020 has 24 divisors (see below), whose sum is σ = 27977959968. Its totient is φ = 5328180000.

The previous prime is 13321643963. The next prime is 13321644031. The reversal of 13321644020 is 2044612331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274595 + ... + 319445.

It is an arithmetic number, because the mean of its divisors is an integer number (1165748332).

Almost surely, 2^13321644020 is an apocalyptic number.

13321644020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13321644020 is an abundant number, since it is smaller than the sum of its proper divisors (14656315948).

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

13321644020 is a wasteful number, since it uses less digits than its factorization.

13321644020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59711 (or 59709 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The spelling of 13321644020 in words is "thirteen billion, three hundred twenty-one million, six hundred forty-four thousand, twenty".