18298127421 has 48 divisors (see below), whose sum is σ = 31718805120. Its totient is φ = 10212713280.

The previous prime is 18298127417. The next prime is 18298127437. The reversal of 18298127421 is 12472189281.

18298127421 is a `hidden beast` number, since 18 + 2 + 98 + 127 + 421 = 666.

It is not a de Polignac number, because 18298127421 - 2² = 18298127417 is a prime.

It is a super-2 number, since 2×18298127421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18298127321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 323281 + ... + 375641.

It is an arithmetic number, because the mean of its divisors is an integer number (660808440).

Almost surely, 2^18298127421 is an apocalyptic number.

It is an amenable number.

18298127421 is a deficient number, since it is larger than the sum of its proper divisors (13420677699).

18298127421 is an equidigital number, since it uses as much as digits as its factorization.

18298127421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52463 (or 52414 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The spelling of 18298127421 in words is "eighteen billion, two hundred ninety-eight million, one hundred twenty-seven thousand, four hundred twenty-one".