20385730472 has 32 divisors (see below), whose sum is σ = 41235301800. Its totient is φ = 9412276224.

The previous prime is 20385730457. The next prime is 20385730487. The reversal of 20385730472 is 27403758302.

It is an interprime number because it is at equal distance from previous prime (20385730457) and next prime (20385730487).

It can be written as a sum of positive squares in 4 ways, for example, as 20315941156 + 69789316 = 142534^2 + 8354^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1406897 + ... + 1421312.

Almost surely, 2^20385730472 is an apocalyptic number.

It is an amenable number.

20385730472 is an abundant number, since it is smaller than the sum of its proper divisors (20849571328).

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

20385730472 is a wasteful number, since it uses less digits than its factorization.

20385730472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828285 (or 2828281 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 41.

The spelling of 20385730472 in words is "twenty billion, three hundred eighty-five million, seven hundred thirty thousand, four hundred seventy-two".