20630243165 has 32 divisors (see below), whose sum is σ = 29533870080. Its totient is φ = 13536230400.

The previous prime is 20630243063. The next prime is 20630243191. The reversal of 20630243165 is 56134203602.

It is not a de Polignac number, because 20630243165 - 2²⁰ = 20629194589 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10256 + ... + 203385.

It is an arithmetic number, because the mean of its divisors is an integer number (922933440).

Almost surely, 2^20630243165 is an apocalyptic number.

It is an amenable number.

20630243165 is a deficient number, since it is larger than the sum of its proper divisors (8903626915).

20630243165 is a wasteful number, since it uses less digits than its factorization.

20630243165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213773.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 20630243165 its reverse (56134203602), we get a palindrome (76764446767).

The spelling of 20630243165 in words is "twenty billion, six hundred thirty million, two hundred forty-three thousand, one hundred sixty-five".