18441687037 has 2 divisors, whose sum is σ = 18441687038. Its totient is φ = 18441687036.

The previous prime is 18441687013. The next prime is 18441687067. The reversal of 18441687037 is 73078614481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9966827556 + 8474859481 = 99834^2 + 92059^2 .

It is an emirp because it is prime and its reverse (73078614481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18441687037 - 2³¹ = 16294203389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18441687067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9220843518 + 9220843519.

It is an arithmetic number, because the mean of its divisors is an integer number (9220843519).

Almost surely, 2^18441687037 is an apocalyptic number.

It is an amenable number.

18441687037 is a deficient number, since it is larger than the sum of its proper divisors (1).

18441687037 is an equidigital number, since it uses as much as digits as its factorization.

18441687037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 18441687037 in words is "eighteen billion, four hundred forty-one million, six hundred eighty-seven thousand, thirty-seven".