20470454784 has 400 divisors, whose sum is σ = 67405289952. Its totient is φ = 6145155072.

The previous prime is 20470454747. The next prime is 20470454819. The reversal of 20470454784 is 48745407402.

20470454784 is a `hidden beast` number, since 20 + 4 + 7 + 0 + 4 + 547 + 84 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 23182407 + ... + 23183289.

Almost surely, 2^20470454784 is an apocalyptic number.

20470454784 is a gapful number since it is divisible by the number (24) 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 20470454784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33702644976).

20470454784 is an abundant number, since it is smaller than the sum of its proper divisors (46934835168).

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

20470454784 is an equidigital number, since it uses as much as digits as its factorization.

20470454784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 1003520, while the sum is 45.

The spelling of 20470454784 in words is "twenty billion, four hundred seventy million, four hundred fifty-four thousand, seven hundred eighty-four".