20485840896 has 336 divisors, whose sum is σ = 63116752608. Its totient is φ = 6635520000.

The previous prime is 20485840883. The next prime is 20485840913. The reversal of 20485840896 is 69804858402.

20485840896 is a `hidden beast` number, since 2 + 0 + 485 + 84 + 0 + 89 + 6 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81616771 + ... + 81617021.

It is an arithmetic number, because the mean of its divisors is an integer number (187847478).

Almost surely, 2^20485840896 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 20485840896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31558376304).

20485840896 is an abundant number, since it is smaller than the sum of its proper divisors (42630911712).

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

20485840896 is an frugal number, since it uses more digits than its factorization.

20485840896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 20485840896 in words is "twenty billion, four hundred eighty-five million, eight hundred forty thousand, eight hundred ninety-six".