20130747 has 32 divisors (see below), whose sum is σ = 34782720. Its totient is φ = 10056960.

The previous prime is 20130743. The next prime is 20130757. The reversal of 20130747 is 74703102.

It is not a de Polignac number, because 20130747 - 2² = 20130743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20130743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3247 + ... + 7127.

It is an arithmetic number, because the mean of its divisors is an integer number (1086960).

Almost surely, 2^20130747 is an apocalyptic number.

20130747 is a deficient number, since it is larger than the sum of its proper divisors (14651973).

20130747 is a wasteful number, since it uses less digits than its factorization.

20130747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3923.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 20130747 is about 4486.7301010870. The cubic root of 20130747 is about 272.0319806327.

Adding to 20130747 its reverse (74703102), we get a palindrome (94833849).

The spelling of 20130747 in words is "twenty million, one hundred thirty thousand, seven hundred forty-seven".