20556550152 has 96 divisors (see below), whose sum is σ = 57217829760. Its totient is φ = 6663264000.

The previous prime is 20556550117. The next prime is 20556550159. The reversal of 20556550152 is 25105565502.

20556550152 is a `hidden beast` number, since 2 + 0 + 5 + 56 + 550 + 1 + 52 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (20556550159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 906877 + ... + 929267.

It is an arithmetic number, because the mean of its divisors is an integer number (596019060).

Almost surely, 2^20556550152 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 20556550152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28608914880).

20556550152 is an abundant number, since it is smaller than the sum of its proper divisors (36661279608).

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

20556550152 is a wasteful number, since it uses less digits than its factorization.

20556550152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22755 (or 22748 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 20556550152 in words is "twenty billion, five hundred fifty-six million, five hundred fifty thousand, one hundred fifty-two".