13435420243 has 16 divisors (see below), whose sum is σ = 15955087360. Its totient is φ = 11070756000.

The previous prime is 13435420223. The next prime is 13435420249. The reversal of 13435420243 is 34202453431.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13435420243 - 2⁵ = 13435420211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13435420249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172248 + ... + 237781.

It is an arithmetic number, because the mean of its divisors is an integer number (997192960).

Almost surely, 2^13435420243 is an apocalyptic number.

13435420243 is a deficient number, since it is larger than the sum of its proper divisors (2519667117).

13435420243 is a wasteful number, since it uses less digits than its factorization.

13435420243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410218.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 13435420243 its reverse (34202453431), we get a palindrome (47637873674).

The spelling of 13435420243 in words is "thirteen billion, four hundred thirty-five million, four hundred twenty thousand, two hundred forty-three".