18848269521 has 9 divisors (see below), whose sum is σ = 27225873129. Its totient is φ = 12565238436.

The previous prime is 18848269513. The next prime is 18848269543. The reversal of 18848269521 is 12596284881.

The square root of 18848269521 is 137289.

It is a perfect power (a square), and thus also a powerful number.

18848269521 is a `hidden beast` number, since 1 + 88 + 482 + 69 + 5 + 21 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 18848269521 - 2³ = 18848269513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18848268521) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 388986 + ... + 434748.

Almost surely, 2^18848269521 is an apocalyptic number.

18848269521 is the 137289-th square number.

18848269521 is the 68645-th centered octagonal number.

It is an amenable number.

18848269521 is a deficient number, since it is larger than the sum of its proper divisors (8377603608).

18848269521 is an frugal number, since it uses more digits than its factorization.

18848269521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91532 (or 45766 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

It can be divided in two parts, 18848 and 269521, that added together give a square (288369 = 537²).

The spelling of 18848269521 in words is "eighteen billion, eight hundred forty-eight million, two hundred sixty-nine thousand, five hundred twenty-one".