19278124237 has 2 divisors, whose sum is σ = 19278124238. Its totient is φ = 19278124236.

The previous prime is 19278124213. The next prime is 19278124241. The reversal of 19278124237 is 73242187291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11766608676 + 7511515561 = 108474^2 + 86669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19278124237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19278124037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9639062118 + 9639062119.

It is an arithmetic number, because the mean of its divisors is an integer number (9639062119).

Almost surely, 2^19278124237 is an apocalyptic number.

It is an amenable number.

19278124237 is a deficient number, since it is larger than the sum of its proper divisors (1).

19278124237 is an equidigital number, since it uses as much as digits as its factorization.

19278124237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 46.

The spelling of 19278124237 in words is "nineteen billion, two hundred seventy-eight million, one hundred twenty-four thousand, two hundred thirty-seven".