20018458084 has 24 divisors (see below), whose sum is σ = 35866563768. Its totient is φ = 9773264640.

The previous prime is 20018458073. The next prime is 20018458093. The reversal of 20018458084 is 48085481002.

It can be written as a sum of positive squares in 4 ways, for example, as 2433600 + 20016024484 = 1560^2 + 141478^2 .

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, 265999 + ... + 332854.

It is an arithmetic number, because the mean of its divisors is an integer number (1494440157).

Almost surely, 2^20018458084 is an apocalyptic number.

It is an amenable number.

20018458084 is a deficient number, since it is larger than the sum of its proper divisors (15848105684).

20018458084 is a wasteful number, since it uses less digits than its factorization.

20018458084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599055 (or 599053 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 40.

The spelling of 20018458084 in words is "twenty billion, eighteen million, four hundred fifty-eight thousand, eighty-four".