20136156228 has 96 divisors (see below), whose sum is σ = 53544395520. Its totient is φ = 6541516800.

The previous prime is 20136156223. The next prime is 20136156253. The reversal of 20136156228 is 82265163102.

20136156228 is a `hidden beast` number, since 2 + 0 + 13 + 6 + 15 + 622 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20136156192 and 20136156201.

It is not an unprimeable number, because it can be changed into a prime (20136156223) 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, 852676 + ... + 875972.

It is an arithmetic number, because the mean of its divisors is an integer number (557754120).

Almost surely, 2^20136156228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20136156228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26772197760).

20136156228 is an abundant number, since it is smaller than the sum of its proper divisors (33408239292).

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

20136156228 is a wasteful number, since it uses less digits than its factorization.

20136156228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23514 (or 23506 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 20136156228 in words is "twenty billion, one hundred thirty-six million, one hundred fifty-six thousand, two hundred twenty-eight".