18400911383 has 2 divisors, whose sum is σ = 18400911384. Its totient is φ = 18400911382.

The previous prime is 18400911377. The next prime is 18400911413. The reversal of 18400911383 is 38311900481.

It is a weak prime.

It is an emirp because it is prime and its reverse (38311900481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18400911383 - 2⁸ = 18400911127 is a prime.

It is a super-3 number, since 3×18400911383³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18400911343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9200455691 + 9200455692.

It is an arithmetic number, because the mean of its divisors is an integer number (9200455692).

Almost surely, 2^18400911383 is an apocalyptic number.

18400911383 is a deficient number, since it is larger than the sum of its proper divisors (1).

18400911383 is an equidigital number, since it uses as much as digits as its factorization.

18400911383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 18400911383 in words is "eighteen billion, four hundred million, nine hundred eleven thousand, three hundred eighty-three".