20476474785 has 40 divisors (see below), whose sum is σ = 39529523880. Its totient is φ = 10080723456.

The previous prime is 20476474783. The next prime is 20476474787. The reversal of 20476474785 is 58747467402.

20476474785 is a `hidden beast` number, since 20 + 4 + 76 + 474 + 7 + 85 = 666.

It is an interprime number because it is at equal distance from previous prime (20476474783) and next prime (20476474787).

It can be written as a sum of positive squares in 4 ways, for example, as 47775744 + 20428699041 = 6912^2 + 142929^2 .

It is not a de Polignac number, because 20476474785 - 2¹ = 20476474783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20476474783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1939320 + ... + 1949849.

It is an arithmetic number, because the mean of its divisors is an integer number (988238097).

Almost surely, 2^20476474785 is an apocalyptic number.

It is an amenable number.

20476474785 is a deficient number, since it is larger than the sum of its proper divisors (19053049095).

20476474785 is a wasteful number, since it uses less digits than its factorization.

20476474785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3889199 (or 3889190 counting only the distinct ones).

The product of its (nonzero) digits is 10536960, while the sum is 54.

The spelling of 20476474785 in words is "twenty billion, four hundred seventy-six million, four hundred seventy-four thousand, seven hundred eighty-five".