20598770238 has 128 divisors (see below), whose sum is σ = 47589811200. Its totient is φ = 5907686400.

The previous prime is 20598770237. The next prime is 20598770263. The reversal of 20598770238 is 83207789502.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20598770237) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 4636098 + ... + 4640538.

It is an arithmetic number, because the mean of its divisors is an integer number (371795400).

Almost surely, 2^20598770238 is an apocalyptic number.

20598770238 is an abundant number, since it is smaller than the sum of its proper divisors (26991040962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20598770238 is a wasteful number, since it uses less digits than its factorization.

20598770238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4578.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 20598770238 in words is "twenty billion, five hundred ninety-eight million, seven hundred seventy thousand, two hundred thirty-eight".