13621654420 has 48 divisors (see below), whose sum is σ = 32848401600. Its totient is φ = 4692625920.

The previous prime is 13621654411. The next prime is 13621654421. The reversal of 13621654420 is 2445612631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13621654421) 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, 1625205 + ... + 1633564.

It is an arithmetic number, because the mean of its divisors is an integer number (684341700).

Almost surely, 2^13621654420 is an apocalyptic number.

13621654420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13621654420 is an abundant number, since it is smaller than the sum of its proper divisors (19226747180).

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

13621654420 is a wasteful number, since it uses less digits than its factorization.

13621654420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258808 (or 3258806 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 13621654420 in words is "thirteen billion, six hundred twenty-one million, six hundred fifty-four thousand, four hundred twenty".