19485939 has 16 divisors (see below), whose sum is σ = 29111040. Its totient is φ = 11489760.

The previous prime is 19485929. The next prime is 19485943. The reversal of 19485939 is 93958491.

It is a de Polignac number, because none of the positive numbers 2^k-19485939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19485919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6759 + ... + 9200.

It is an arithmetic number, because the mean of its divisors is an integer number (1819440).

Almost surely, 2^19485939 is an apocalyptic number.

19485939 is a deficient number, since it is larger than the sum of its proper divisors (9625101).

19485939 is a wasteful number, since it uses less digits than its factorization.

19485939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16010.

The product of its digits is 349920, while the sum is 48.

The square root of 19485939 is about 4414.2880513170. The cubic root of 19485939 is about 269.0959198750.

It can be divided in two parts, 1948 and 5939, that added together give a palindrome (7887).

The spelling of 19485939 in words is "nineteen million, four hundred eighty-five thousand, nine hundred thirty-nine".