20555321124188 has 6 divisors (see below), whose sum is σ = 35971811967336. Its totient is φ = 10277660562092.

The previous prime is 20555321124187. The next prime is 20555321124209. The reversal of 20555321124188 is 88142112355502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555321124181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2569415140520 + ... + 2569415140527.

It is an arithmetic number, because the mean of its divisors is an integer number (5995301994556).

Almost surely, 2^{20555321124188} is an apocalyptic number.

It is an amenable number.

20555321124188 is a deficient number, since it is larger than the sum of its proper divisors (15416490843148).

20555321124188 is a wasteful number, since it uses less digits than its factorization.

20555321124188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138830281051 (or 5138830281049 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 47.

The spelling of 20555321124188 in words is "twenty trillion, five hundred fifty-five billion, three hundred twenty-one million, one hundred twenty-four thousand, one hundred eighty-eight".