13002321020 has 48 divisors (see below), whose sum is σ = 29425975488. Its totient is φ = 4797473280.

The previous prime is 13002321019. The next prime is 13002321023. The reversal of 13002321020 is 2012320031.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13002320986 and 13002321004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13002321023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368177 + ... + 401943.

It is an arithmetic number, because the mean of its divisors is an integer number (613041156).

Almost surely, 2^13002321020 is an apocalyptic number.

13002321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13002321020 is an abundant number, since it is smaller than the sum of its proper divisors (16423654468).

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

13002321020 is a wasteful number, since it uses less digits than its factorization.

13002321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35270 (or 35268 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 13002321020 its reverse (2012320031), we get a palindrome (15014641051).

The spelling of 13002321020 in words is "thirteen billion, two million, three hundred twenty-one thousand, twenty".