135423020 has 24 divisors (see below), whose sum is σ = 301117824. Its totient is φ = 50982656.

The previous prime is 135423007. The next prime is 135423047. The reversal of 135423020 is 20324531.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 135422983 and 135423001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198812 + ... + 199491.

It is an arithmetic number, because the mean of its divisors is an integer number (12546576).

Almost surely, 2^135423020 is an apocalyptic number.

135423020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135423020 is an abundant number, since it is smaller than the sum of its proper divisors (165694804).

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

135423020 is a wasteful number, since it uses less digits than its factorization.

135423020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398329 (or 398327 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 135423020 is about 11637.1396829290. The cubic root of 135423020 is about 513.5280431131.

Adding to 135423020 its reverse (20324531), we get a palindrome (155747551).

The spelling of 135423020 in words is "one hundred thirty-five million, four hundred twenty-three thousand, twenty".