20117030004631 has 4 divisors (see below), whose sum is σ = 22990891433872. Its totient is φ = 17243168575392.

The previous prime is 20117030004611. The next prime is 20117030004641. The reversal of 20117030004631 is 13640003071102.

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

It is a cyclic number.

It is not a de Polignac number, because 20117030004631 - 2¹¹ = 20117030002583 is a prime.

It is a super-2 number, since 2×20117030004631² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20117030004631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117030004611) 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, 1436930714610 + ... + 1436930714623.

It is an arithmetic number, because the mean of its divisors is an integer number (5747722858468).

Almost surely, 2^{20117030004631} is an apocalyptic number.

20117030004631 is a deficient number, since it is larger than the sum of its proper divisors (2873861429241).

20117030004631 is an equidigital number, since it uses as much as digits as its factorization.

20117030004631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2873861429240.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 20117030004631 its reverse (13640003071102), we get a palindrome (33757033075733).

The spelling of 20117030004631 in words is "twenty trillion, one hundred seventeen billion, thirty million, four thousand, six hundred thirty-one".