18380655031 has 2 divisors, whose sum is σ = 18380655032. Its totient is φ = 18380655030.

The previous prime is 18380654989. The next prime is 18380655037. The reversal of 18380655031 is 13055608381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18380655031 - 2¹⁵ = 18380622263 is a prime.

It is a super-2 number, since 2×18380655031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18380655037) 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, 9190327515 + 9190327516.

It is an arithmetic number, because the mean of its divisors is an integer number (9190327516).

Almost surely, 2^18380655031 is an apocalyptic number.

18380655031 is a deficient number, since it is larger than the sum of its proper divisors (1).

18380655031 is an equidigital number, since it uses as much as digits as its factorization.

18380655031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 18380655031 in words is "eighteen billion, three hundred eighty million, six hundred fifty-five thousand, thirty-one".