18887523841 has 16 divisors (see below), whose sum is σ = 19230350400. Its totient is φ = 18548006400.

The previous prime is 18887523839. The next prime is 18887523859. The reversal of 18887523841 is 14832578881.

It is a cyclic number.

It is not a de Polignac number, because 18887523841 - 2¹ = 18887523839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18887523241) 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, 13877001 + ... + 13878361.

It is an arithmetic number, because the mean of its divisors is an integer number (1201896900).

Almost surely, 2^18887523841 is an apocalyptic number.

It is an amenable number.

18887523841 is a deficient number, since it is larger than the sum of its proper divisors (342826559).

18887523841 is a wasteful number, since it uses less digits than its factorization.

18887523841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400.

The product of its digits is 3440640, while the sum is 55.

The spelling of 18887523841 in words is "eighteen billion, eight hundred eighty-seven million, five hundred twenty-three thousand, eight hundred forty-one".