20310161042216 has 48 divisors (see below), whose sum is σ = 38967333802740. Its totient is φ = 9923166489600.

The previous prime is 20310161042173. The next prime is 20310161042219. The reversal of 20310161042216 is 61224016101302.

It can be written as a sum of positive squares in 2 ways, for example, as 20116534641316 + 193626400900 = 4485146^2 + 440030^2 .

It is not an unprimeable number, because it can be changed into a prime (20310161042219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2746166 + ... + 6939866.

Almost surely, 2^{20310161042216} is an apocalyptic number.

It is an amenable number.

20310161042216 is a deficient number, since it is larger than the sum of its proper divisors (18657172760524).

20310161042216 is an equidigital number, since it uses as much as digits as its factorization.

20310161042216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4193962 (or 4193879 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 20310161042216 its reverse (61224016101302), we get a palindrome (81534177143518).

The spelling of 20310161042216 in words is "twenty trillion, three hundred ten billion, one hundred sixty-one million, forty-two thousand, two hundred sixteen".