20131030005 has 32 divisors (see below), whose sum is σ = 33931578240. Its totient is φ = 10163462400.

The previous prime is 20131030001. The next prime is 20131030013. The reversal of 20131030005 is 50003013102.

It is a happy number.

It is not a de Polignac number, because 20131030005 - 2² = 20131030001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131030001) 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, 343639 + ... + 397931.

It is an arithmetic number, because the mean of its divisors is an integer number (1060361820).

Almost surely, 2^20131030005 is an apocalyptic number.

It is an amenable number.

20131030005 is a deficient number, since it is larger than the sum of its proper divisors (13800548235).

20131030005 is a wasteful number, since it uses less digits than its factorization.

20131030005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55621.

The product of its (nonzero) digits is 90, while the sum is 15.

Adding to 20131030005 its reverse (50003013102), we get a palindrome (70134043107).

The spelling of 20131030005 in words is "twenty billion, one hundred thirty-one million, thirty thousand, five".