18272252114921 has 16 divisors (see below), whose sum is σ = 21794097561600. Its totient is φ = 14978511705168.

The previous prime is 18272252114911. The next prime is 18272252114923. The reversal of 18272252114921 is 12941125227281.

It is a cyclic number.

It is not a de Polignac number, because 18272252114921 - 2¹⁴ = 18272252098537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18272252114923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8356061 + ... + 10313498.

It is an arithmetic number, because the mean of its divisors is an integer number (1362131097600).

Almost surely, 2^{18272252114921} is an apocalyptic number.

It is an amenable number.

18272252114921 is a deficient number, since it is larger than the sum of its proper divisors (3521845446679).

18272252114921 is a wasteful number, since it uses less digits than its factorization.

18272252114921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18675668.

The product of its digits is 322560, while the sum is 47.

The spelling of 18272252114921 in words is "eighteen trillion, two hundred seventy-two billion, two hundred fifty-two million, one hundred fourteen thousand, nine hundred twenty-one".