18900000545 has 8 divisors (see below), whose sum is σ = 22682420520. Its totient is φ = 15118387200.

The previous prime is 18900000517. The next prime is 18900000577. The reversal of 18900000545 is 54500000981.

It can be written as a sum of positive squares in 4 ways, for example, as 6438297121 + 12461703424 = 80239^2 + 111632^2 .

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

It is not a de Polignac number, because 18900000545 - 2¹⁸ = 18899738401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148850 + ... + 244859.

It is an arithmetic number, because the mean of its divisors is an integer number (2835302565).

Almost surely, 2^18900000545 is an apocalyptic number.

It is an amenable number.

18900000545 is a deficient number, since it is larger than the sum of its proper divisors (3782419975).

18900000545 is an equidigital number, since it uses as much as digits as its factorization.

18900000545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403315.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 18900000545 in words is "eighteen billion, nine hundred million, five hundred forty-five", and thus it is an aban number.