18889125065 has 16 divisors (see below), whose sum is σ = 23727707136. Its totient is φ = 14417860800.

The previous prime is 18889125029. The next prime is 18889125077. The reversal of 18889125065 is 56052198881.

It is a happy number.

It is not a de Polignac number, because 18889125065 - 2¹⁰ = 18889124041 is a prime.

It is a super-2 number, since 2×18889125065² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18889124998 and 18889125016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 847202 + ... + 869211.

It is an arithmetic number, because the mean of its divisors is an integer number (1482981696).

Almost surely, 2^18889125065 is an apocalyptic number.

It is an amenable number.

18889125065 is a deficient number, since it is larger than the sum of its proper divisors (4838582071).

18889125065 is a wasteful number, since it uses less digits than its factorization.

18889125065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716520.

The product of its (nonzero) digits is 1382400, while the sum is 53.

The spelling of 18889125065 in words is "eighteen billion, eight hundred eighty-nine million, one hundred twenty-five thousand, sixty-five".