13423440342420 has 36 divisors (see below), whose sum is σ = 40717769039220. Its totient is φ = 3579584091264.

The previous prime is 13423440342397. The next prime is 13423440342427. The reversal of 13423440342420 is 2424304432431.

13423440342420 is a `hidden beast` number, since 1 + 3 + 4 + 2 + 3 + 4 + 403 + 4 + 242 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10201968178704 + 3221472163716 = 3194052^2 + 1794846^2 .

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 (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13423440342427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37287334105 + ... + 37287334464.

Almost surely, 2^{13423440342420} is an apocalyptic number.

13423440342420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13423440342420 is an abundant number, since it is smaller than the sum of its proper divisors (27294328696800).

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

13423440342420 is a wasteful number, since it uses less digits than its factorization.

13423440342420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74574668584 (or 74574668579 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 36.

Adding to 13423440342420 its reverse (2424304432431), we get a palindrome (15847744774851).

The spelling of 13423440342420 in words is "thirteen trillion, four hundred twenty-three billion, four hundred forty million, three hundred forty-two thousand, four hundred twenty".