20550238272 has 448 divisors, whose sum is σ = 66922700800. Its totient is φ = 6158592000.

The previous prime is 20550238223. The next prime is 20550238279. The reversal of 20550238272 is 27283205502.

It is a happy number.

20550238272 is a `hidden beast` number, since 2 + 0 + 5 + 502 + 3 + 82 + 72 = 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 (20550238279) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62085147 + ... + 62085477.

Almost surely, 2^20550238272 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 20550238272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33461350400).

20550238272 is an abundant number, since it is smaller than the sum of its proper divisors (46372462528).

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

20550238272 is a wasteful number, since it uses less digits than its factorization.

20550238272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The spelling of 20550238272 in words is "twenty billion, five hundred fifty million, two hundred thirty-eight thousand, two hundred seventy-two".