18887601449 has 16 divisors (see below), whose sum is σ = 19943573760. Its totient is φ = 17851468800.

The previous prime is 18887601437. The next prime is 18887601493. The reversal of 18887601449 is 94410678881.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18887601449 - 2⁸ = 18887601193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18887601394 and 18887601403.

It is not an unprimeable number, because it can be changed into a prime (18887601049) 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, 5220089 + ... + 5223705.

It is an arithmetic number, because the mean of its divisors is an integer number (1246473360).

Almost surely, 2^18887601449 is an apocalyptic number.

It is an amenable number.

18887601449 is a deficient number, since it is larger than the sum of its proper divisors (1055972311).

18887601449 is a wasteful number, since it uses less digits than its factorization.

18887601449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6280.

The product of its (nonzero) digits is 3096576, while the sum is 56.

The spelling of 18887601449 in words is "eighteen billion, eight hundred eighty-seven million, six hundred one thousand, four hundred forty-nine".