20085747 has 8 divisors (see below), whose sum is σ = 29215680. Its totient is φ = 12173160.

The previous prime is 20085743. The next prime is 20085749. The reversal of 20085747 is 74758002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20085747 - 2² = 20085743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 608659 = 20085747 / (2 + 0 + 0 + 8 + 5 + 7 + 4 + 7).

It is not an unprimeable number, because it can be changed into a prime (20085743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304297 + ... + 304362.

It is an arithmetic number, because the mean of its divisors is an integer number (3651960).

Almost surely, 2^20085747 is an apocalyptic number.

20085747 is a deficient number, since it is larger than the sum of its proper divisors (9129933).

20085747 is a wasteful number, since it uses less digits than its factorization.

20085747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608673.

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 20085747 is about 4481.7125075132. The cubic root of 20085747 is about 271.8291305361.

The spelling of 20085747 in words is "twenty million, eighty-five thousand, seven hundred forty-seven".