20787770684158 has 8 divisors (see below), whose sum is σ = 31181680288152. Its totient is φ = 10393877254776.

The previous prime is 20787770684141. The next prime is 20787770684173. The reversal of 20787770684158 is 85148607778702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36385 + ... + 6448012.

It is an arithmetic number, because the mean of its divisors is an integer number (3897710036019).

Almost surely, 2^{20787770684158} is an apocalyptic number.

20787770684158 is a deficient number, since it is larger than the sum of its proper divisors (10393909603994).

20787770684158 is a wasteful number, since it uses less digits than its factorization.

20787770684158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8087306.

The product of its (nonzero) digits is 295034880, while the sum is 70.

The spelling of 20787770684158 in words is "twenty trillion, seven hundred eighty-seven billion, seven hundred seventy million, six hundred eighty-four thousand, one hundred fifty-eight".