20275546320 has 320 divisors, whose sum is σ = 71882899200. Its totient is φ = 5249802240.

The previous prime is 20275546297. The next prime is 20275546331. The reversal of 20275546320 is 2364557202.

20275546320 is a `hidden beast` number, since 2 + 0 + 27 + 554 + 63 + 20 = 666.

It is a super-2 number, since 2×20275546320² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25062076 + ... + 25062884.

It is an arithmetic number, because the mean of its divisors is an integer number (224634060).

Almost surely, 2^20275546320 is an apocalyptic number.

20275546320 is a gapful number since it is divisible by the number (20) 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 20275546320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35941449600).

20275546320 is an abundant number, since it is smaller than the sum of its proper divisors (51607352880).

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

20275546320 is a wasteful number, since it uses less digits than its factorization.

20275546320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1143 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The spelling of 20275546320 in words is "twenty billion, two hundred seventy-five million, five hundred forty-six thousand, three hundred twenty".