13251220454420 has 48 divisors (see below), whose sum is σ = 29975230201728. Its totient is φ = 4891601508480.

The previous prime is 13251220454399. The next prime is 13251220454441. The reversal of 13251220454420 is 2445402215231.

It is an interprime number because it is at equal distance from previous prime (13251220454399) and next prime (13251220454441).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4922894 + ... + 7123013.

It is an arithmetic number, because the mean of its divisors is an integer number (624483962536).

Almost surely, 2^{13251220454420} is an apocalyptic number.

13251220454420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13251220454420 is an abundant number, since it is smaller than the sum of its proper divisors (16724009747308).

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

13251220454420 is a wasteful number, since it uses less digits than its factorization.

13251220454420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12050160 (or 12050158 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 13251220454420 its reverse (2445402215231), we get a palindrome (15696622669651).

The spelling of 13251220454420 in words is "thirteen trillion, two hundred fifty-one billion, two hundred twenty million, four hundred fifty-four thousand, four hundred twenty".