13533221402420 has 96 divisors (see below), whose sum is σ = 30682456197120. Its totient is φ = 4998653918720.

The previous prime is 13533221402399. The next prime is 13533221402563. The reversal of 13533221402420 is 2420412233531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96685085 + ... + 96824955.

It is an arithmetic number, because the mean of its divisors is an integer number (319608918720).

Almost surely, 2^{13533221402420} is an apocalyptic number.

13533221402420 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 13533221402420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15341228098560).

13533221402420 is an abundant number, since it is smaller than the sum of its proper divisors (17149234794700).

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

13533221402420 is a wasteful number, since it uses less digits than its factorization.

13533221402420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147185 (or 147183 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 13533221402420 its reverse (2420412233531), we get a palindrome (15953633635951).

The spelling of 13533221402420 in words is "thirteen trillion, five hundred thirty-three billion, two hundred twenty-one million, four hundred two thousand, four hundred twenty".