13421340020 has 48 divisors (see below), whose sum is σ = 31136313600. Its totient is φ = 4818702720.

The previous prime is 13421339977. The next prime is 13421340067. The reversal of 13421340020 is 2004312431.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13421339974 and 13421340001.

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, 368735 + ... + 403494.

It is an arithmetic number, because the mean of its divisors is an integer number (648673200).

Almost surely, 2^13421340020 is an apocalyptic number.

13421340020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13421340020 is an abundant number, since it is smaller than the sum of its proper divisors (17714973580).

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

13421340020 is a wasteful number, since it uses less digits than its factorization.

13421340020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772328 (or 772326 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 13421340020 its reverse (2004312431), we get a palindrome (15425652451).

The spelling of 13421340020 in words is "thirteen billion, four hundred twenty-one million, three hundred forty thousand, twenty".