2018559553921 has 4 divisors (see below), whose sum is σ = 2018758417344. Its totient is φ = 2018360690500.

The previous prime is 2018559553909. The next prime is 2018559554017. The reversal of 2018559553921 is 1293559558102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2018559553921 - 2⁷ = 2018559553793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2018559553321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99416485 + ... + 99436786.

It is an arithmetic number, because the mean of its divisors is an integer number (504689604336).

Almost surely, 2^{2018559553921} is an apocalyptic number.

It is an amenable number.

2018559553921 is a deficient number, since it is larger than the sum of its proper divisors (198863423).

2018559553921 is a wasteful number, since it uses less digits than its factorization.

2018559553921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198863422.

The product of its (nonzero) digits is 4860000, while the sum is 55.

The spelling of 2018559553921 in words is "two trillion, eighteen billion, five hundred fifty-nine million, five hundred fifty-three thousand, nine hundred twenty-one".