18490127121 has 8 divisors (see below), whose sum is σ = 27392780960. Its totient is φ = 12326751396.

The previous prime is 18490127113. The next prime is 18490127171. The reversal of 18490127121 is 12172109481.

It is not a de Polignac number, because 18490127121 - 2³ = 18490127113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18490127101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342409735 + ... + 342409788.

It is an arithmetic number, because the mean of its divisors is an integer number (3424097620).

Almost surely, 2^18490127121 is an apocalyptic number.

It is an amenable number.

18490127121 is a deficient number, since it is larger than the sum of its proper divisors (8902653839).

18490127121 is an equidigital number, since it uses as much as digits as its factorization.

18490127121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684819532 (or 684819526 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The spelling of 18490127121 in words is "eighteen billion, four hundred ninety million, one hundred twenty-seven thousand, one hundred twenty-one".