135320420443 has 48 divisors (see below), whose sum is σ = 159410626560. Its totient is φ = 114470928000.

The previous prime is 135320420437. The next prime is 135320420447. The reversal of 135320420443 is 344024023531.

It is a happy number.

It is not a de Polignac number, because 135320420443 - 2¹³ = 135320412251 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 (135320420447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12164638 + ... + 12175756.

It is an arithmetic number, because the mean of its divisors is an integer number (3321054720).

Almost surely, 2^135320420443 is an apocalyptic number.

135320420443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

135320420443 is a deficient number, since it is larger than the sum of its proper divisors (24090206117).

135320420443 is a wasteful number, since it uses less digits than its factorization.

135320420443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11300 (or 11287 counting only the distinct ones).

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

Adding to 135320420443 its reverse (344024023531), we get a palindrome (479344443974).

The spelling of 135320420443 in words is "one hundred thirty-five billion, three hundred twenty million, four hundred twenty thousand, four hundred forty-three".