13203421020 has 72 divisors (see below), whose sum is σ = 41431440960. Its totient is φ = 3399500160.

The previous prime is 13203421001. The next prime is 13203421051. The reversal of 13203421020 is 2012430231.

13203421020 is a `hidden beast` number, since 1 + 320 + 342 + 1 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13203420984 and 13203421002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1259476 + ... + 1269915.

It is an arithmetic number, because the mean of its divisors is an integer number (575436680).

Almost surely, 2^13203421020 is an apocalyptic number.

13203421020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13203421020 is an abundant number, since it is smaller than the sum of its proper divisors (28228019940).

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

13203421020 is a wasteful number, since it uses less digits than its factorization.

13203421020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529435 (or 2529430 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 13203421020 its reverse (2012430231), we get a palindrome (15215851251).

The spelling of 13203421020 in words is "thirteen billion, two hundred three million, four hundred twenty-one thousand, twenty".