13051200420 has 36 divisors (see below), whose sum is σ = 39588641820. Its totient is φ = 3480320064.

The previous prime is 13051200359. The next prime is 13051200443. The reversal of 13051200420 is 2400215031.

13051200420 is a `hidden beast` number, since 130 + 512 + 0 + 0 + 4 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10394210304 + 2656990116 = 101952^2 + 51546^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13051200393 and 13051200402.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36253155 + ... + 36253514.

It is an arithmetic number, because the mean of its divisors is an integer number (1099684495).

Almost surely, 2^13051200420 is an apocalyptic number.

13051200420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13051200420 is an abundant number, since it is smaller than the sum of its proper divisors (26537441400).

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

13051200420 is a wasteful number, since it uses less digits than its factorization.

13051200420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72506684 (or 72506679 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 13051200420 its reverse (2400215031), we get a palindrome (15451415451).

The spelling of 13051200420 in words is "thirteen billion, fifty-one million, two hundred thousand, four hundred twenty".