19474840237 has 2 divisors, whose sum is σ = 19474840238. Its totient is φ = 19474840236.

The previous prime is 19474840139. The next prime is 19474840279. The reversal of 19474840237 is 73204847491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19469737156 + 5103081 = 139534^2 + 2259^2 .

It is a cyclic number.

It is not a de Polignac number, because 19474840237 - 2⁷ = 19474840109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19474810237) 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, 9737420118 + 9737420119.

It is an arithmetic number, because the mean of its divisors is an integer number (9737420119).

Almost surely, 2^19474840237 is an apocalyptic number.

It is an amenable number.

19474840237 is a deficient number, since it is larger than the sum of its proper divisors (1).

19474840237 is an equidigital number, since it uses as much as digits as its factorization.

19474840237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 19474840237 in words is "nineteen billion, four hundred seventy-four million, eight hundred forty thousand, two hundred thirty-seven".