18937487383 has 2 divisors, whose sum is σ = 18937487384. Its totient is φ = 18937487382.

The previous prime is 18937487363. The next prime is 18937487431. The reversal of 18937487383 is 38378473981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18937487383 - 2⁵ = 18937487351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18937487323) 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, 9468743691 + 9468743692.

It is an arithmetic number, because the mean of its divisors is an integer number (9468743692).

Almost surely, 2^18937487383 is an apocalyptic number.

18937487383 is a deficient number, since it is larger than the sum of its proper divisors (1).

18937487383 is an equidigital number, since it uses as much as digits as its factorization.

18937487383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24385536, while the sum is 61.

The spelling of 18937487383 in words is "eighteen billion, nine hundred thirty-seven million, four hundred eighty-seven thousand, three hundred eighty-three".