19939163 has 2 divisors, whose sum is σ = 19939164. Its totient is φ = 19939162.

The previous prime is 19939123. The next prime is 19939177. The reversal of 19939163 is 36193991.

It is a strong prime.

It is an emirp because it is prime and its reverse (36193991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19939163 - 2¹⁴ = 19922779 is a prime.

It is a super-2 number, since 2×19939163² = 795140442281138, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19939163.

It is not a weakly prime, because it can be changed into another prime (19939123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9969581 + 9969582.

It is an arithmetic number, because the mean of its divisors is an integer number (9969582).

Almost surely, 2^19939163 is an apocalyptic number.

19939163 is a deficient number, since it is larger than the sum of its proper divisors (1).

19939163 is an equidigital number, since it uses as much as digits as its factorization.

19939163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39366, while the sum is 41.

The square root of 19939163 is about 4465.3289912391. The cubic root of 19939163 is about 271.1662537449.

It can be divided in two parts, 19939 and 163, that added together give a palindrome (20102).

The spelling of 19939163 in words is "nineteen million, nine hundred thirty-nine thousand, one hundred sixty-three".