20558898118 has 32 divisors (see below), whose sum is σ = 33895065600. Its totient is φ = 9274716000.

The previous prime is 20558898103. The next prime is 20558898121. The reversal of 20558898118 is 81189885502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6918373 + ... + 6921343.

It is an arithmetic number, because the mean of its divisors is an integer number (1059220800).

Almost surely, 2^20558898118 is an apocalyptic number.

20558898118 is a deficient number, since it is larger than the sum of its proper divisors (13336167482).

20558898118 is a wasteful number, since it uses less digits than its factorization.

20558898118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5244.

The product of its (nonzero) digits is 1843200, while the sum is 55.

The spelling of 20558898118 in words is "twenty billion, five hundred fifty-eight million, eight hundred ninety-eight thousand, one hundred eighteen".