13406683720 has 16 divisors (see below), whose sum is σ = 30165038460. Its totient is φ = 5362673472.

The previous prime is 13406683691. The next prime is 13406683733. The reversal of 13406683720 is 2738660431.

It can be written as a sum of positive squares in 2 ways, for example, as 12326772676 + 1079911044 = 111026^2 + 32862^2 .

It is a super-2 number, since 2×13406683720² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 335167093 = 13406683720 / (1 + 3 + 4 + 0 + 6 + 6 + 8 + 3 + 7 + 2 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167583507 + ... + 167583586.

Almost surely, 2^13406683720 is an apocalyptic number.

13406683720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13406683720 is an abundant number, since it is smaller than the sum of its proper divisors (16758354740).

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

13406683720 is a wasteful number, since it uses less digits than its factorization.

13406683720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335167104 (or 335167100 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 13406683720 in words is "thirteen billion, four hundred six million, six hundred eighty-three thousand, seven hundred twenty".