18893520445 has 8 divisors (see below), whose sum is σ = 23454025560. Its totient is φ = 14593615680.

The previous prime is 18893520439. The next prime is 18893520467. The reversal of 18893520445 is 54402539881.

It can be written as a sum of positive squares in 4 ways, for example, as 743044 + 18892777401 = 862^2 + 137451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18893520445 - 2²⁷ = 18759302717 is a prime.

It is a super-2 number, since 2×18893520445² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65149926 + ... + 65150215.

It is an arithmetic number, because the mean of its divisors is an integer number (2931753195).

Almost surely, 2^18893520445 is an apocalyptic number.

It is an amenable number.

18893520445 is a deficient number, since it is larger than the sum of its proper divisors (4560505115).

18893520445 is a wasteful number, since it uses less digits than its factorization.

18893520445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130300175.

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 18893520445 in words is "eighteen billion, eight hundred ninety-three million, five hundred twenty thousand, four hundred forty-five".