135240322020 has 384 divisors, whose sum is σ = 428749977600. Its totient is φ = 31685541888.

The previous prime is 135240322013. The next prime is 135240322027. The reversal of 135240322020 is 20223042531.

It is an interprime number because it is at equal distance from previous prime (135240322013) and next prime (135240322027).

It is not an unprimeable number, because it can be changed into a prime (135240322027) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 123732594 + ... + 123733686.

It is an arithmetic number, because the mean of its divisors is an integer number (1116536400).

Almost surely, 2^135240322020 is an apocalyptic number.

135240322020 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 135240322020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214374988800).

135240322020 is an abundant number, since it is smaller than the sum of its proper divisors (293509655580).

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

135240322020 is a wasteful number, since it uses less digits than its factorization.

135240322020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287 (or 1285 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 135240322020 its reverse (20223042531), we get a palindrome (155463364551).

The spelling of 135240322020 in words is "one hundred thirty-five billion, two hundred forty million, three hundred twenty-two thousand, twenty".