18752939 has 2 divisors, whose sum is σ = 18752940. Its totient is φ = 18752938.

The previous prime is 18752917. The next prime is 18752957. The reversal of 18752939 is 93925781.

It is a strong prime.

It is an emirp because it is prime and its reverse (93925781) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18752939 is a prime.

It is a super-2 number, since 2×18752939² = 703345442275442, which contains 22 as substring.

It is a Sophie Germain prime.

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 18752939.

It is not a weakly prime, because it can be changed into another prime (18752959) 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 as a sum of consecutive naturals, namely, 9376469 + 9376470.

It is an arithmetic number, because the mean of its divisors is an integer number (9376470).

Almost surely, 2^18752939 is an apocalyptic number.

18752939 is a deficient number, since it is larger than the sum of its proper divisors (1).

18752939 is an equidigital number, since it uses as much as digits as its factorization.

18752939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 18752939 is about 4330.4663721128. The cubic root of 18752939 is about 265.6785222528.

It can be divided in two parts, 18752 and 939, that added together give a palindrome (19691).

The spelling of 18752939 in words is "eighteen million, seven hundred fifty-two thousand, nine hundred thirty-nine".