20155135224 has 128 divisors (see below), whose sum is σ = 59822945280. Its totient is φ = 5538892800.

The previous prime is 20155135223. The next prime is 20155135261. The reversal of 20155135224 is 42253155102.

It is a junction number, because it is equal to n+sod(n) for n = 20155135191 and 20155135200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155135223) 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 31 ways as a sum of consecutive naturals, for example, 468442 + ... + 509654.

It is an arithmetic number, because the mean of its divisors is an integer number (467366760).

Almost surely, 2^20155135224 is an apocalyptic number.

20155135224 is a gapful number since it is divisible by the number (24) 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 20155135224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29911472640).

20155135224 is an abundant number, since it is smaller than the sum of its proper divisors (39667810056).

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

20155135224 is a wasteful number, since it uses less digits than its factorization.

20155135224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41341 (or 41337 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 20155135224 in words is "twenty billion, one hundred fifty-five million, one hundred thirty-five thousand, two hundred twenty-four".