18896445 has 12 divisors (see below), whose sum is σ = 32753916. Its totient is φ = 10078080.

The previous prime is 18896441. The next prime is 18896447. The reversal of 18896445 is 54469881.

It can be written as a sum of positive squares in 2 ways, for example, as 6827769 + 12068676 = 2613^2 + 3474^2 .

It is not a de Polignac number, because 18896445 - 2² = 18896441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 419921 = 18896445 / (1 + 8 + 8 + 9 + 6 + 4 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 18896445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18896441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209916 + ... + 210005.

It is an arithmetic number, because the mean of its divisors is an integer number (2729493).

Almost surely, 2^18896445 is an apocalyptic number.

18896445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18896445 is a deficient number, since it is larger than the sum of its proper divisors (13857471).

18896445 is a wasteful number, since it uses less digits than its factorization.

18896445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419932 (or 419929 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 18896445 is about 4347.0041407848. The cubic root of 18896445 is about 266.3544984241.

The spelling of 18896445 in words is "eighteen million, eight hundred ninety-six thousand, four hundred forty-five".