20938581055 has 8 divisors (see below), whose sum is σ = 28715768352. Its totient is φ = 14357884128.

The previous prime is 20938580989. The next prime is 20938581061. The reversal of 20938581055 is 55018583902.

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

It is not a de Polignac number, because 20938581055 - 2⁹ = 20938580543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20938580996 and 20938581014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299122552 + ... + 299122621.

It is an arithmetic number, because the mean of its divisors is an integer number (3589471044).

Almost surely, 2^20938581055 is an apocalyptic number.

20938581055 is a deficient number, since it is larger than the sum of its proper divisors (7777187297).

20938581055 is an equidigital number, since it uses as much as digits as its factorization.

20938581055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598245185.

The product of its (nonzero) digits is 432000, while the sum is 46.

The spelling of 20938581055 in words is "twenty billion, nine hundred thirty-eight million, five hundred eighty-one thousand, fifty-five".