135115020 has 96 divisors (see below), whose sum is σ = 428379840. Its totient is φ = 35343360.

The previous prime is 135115003. The next prime is 135115021. The reversal of 135115020 is 20511531.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 135114984 and 135115002.

It is not an unprimeable number, because it can be changed into a prime (135115021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26260 + ... + 30980.

It is an arithmetic number, because the mean of its divisors is an integer number (4462290).

Almost surely, 2^135115020 is an apocalyptic number.

135115020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135115020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214189920).

135115020 is an abundant number, since it is smaller than the sum of its proper divisors (293264820).

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

135115020 is a wasteful number, since it uses less digits than its factorization.

135115020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4792 (or 4784 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 135115020 is about 11623.8986575073. The cubic root of 135115020 is about 513.1384325973.

Adding to 135115020 its reverse (20511531), we get a palindrome (155626551).

The spelling of 135115020 in words is "one hundred thirty-five million, one hundred fifteen thousand, twenty".