20080747 has 4 divisors (see below), whose sum is σ = 20126520. Its totient is φ = 20034976.

The previous prime is 20080741. The next prime is 20080763. The reversal of 20080747 is 74708002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20080747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20080741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22222 + ... + 23107.

It is an arithmetic number, because the mean of its divisors is an integer number (5031630).

Almost surely, 2^20080747 is an apocalyptic number.

20080747 is a deficient number, since it is larger than the sum of its proper divisors (45773).

20080747 is an equidigital number, since it uses as much as digits as its factorization.

20080747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45772.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 20080747 is about 4481.1546503106. The cubic root of 20080747 is about 271.8065729410.

Adding to 20080747 its reverse (74708002), we get a palindrome (94788749).

The spelling of 20080747 in words is "twenty million, eighty thousand, seven hundred forty-seven".