13400020420 has 12 divisors (see below), whose sum is σ = 28140042924. Its totient is φ = 5360008160.

The previous prime is 13400020411. The next prime is 13400020423. The reversal of 13400020420 is 2402000431.

It can be written as a sum of positive squares in 2 ways, for example, as 9394649476 + 4005370944 = 96926^2 + 63288^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13400020394 and 13400020403.

It is not an unprimeable number, because it can be changed into a prime (13400020423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335000491 + ... + 335000530.

It is an arithmetic number, because the mean of its divisors is an integer number (2345003577).

Almost surely, 2^13400020420 is an apocalyptic number.

13400020420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13400020420 is an abundant number, since it is smaller than the sum of its proper divisors (14740022504).

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

13400020420 is a wasteful number, since it uses less digits than its factorization.

13400020420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670001030 (or 670001028 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 13400020420 its reverse (2402000431), we get a palindrome (15802020851).

The spelling of 13400020420 in words is "thirteen billion, four hundred million, twenty thousand, four hundred twenty".