13531272420 has 24 divisors (see below), whose sum is σ = 37887562944. Its totient is φ = 3608339296.

The previous prime is 13531272413. The next prime is 13531272463. The reversal of 13531272420 is 2427213531.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 112760544 + ... + 112760663.

It is an arithmetic number, because the mean of its divisors is an integer number (1578648456).

Almost surely, 2^13531272420 is an apocalyptic number.

13531272420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13531272420 is an abundant number, since it is smaller than the sum of its proper divisors (24356290524).

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

13531272420 is a wasteful number, since it uses less digits than its factorization.

13531272420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225521219 (or 225521217 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

Adding to 13531272420 its reverse (2427213531), we get a palindrome (15958485951).

The spelling of 13531272420 in words is "thirteen billion, five hundred thirty-one million, two hundred seventy-two thousand, four hundred twenty".