20887755055 has 8 divisors (see below), whose sum is σ = 25066947744. Its totient is φ = 16709109600.

The previous prime is 20887755047. The next prime is 20887755061. The reversal of 20887755055 is 55055778802.

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

It is not a de Polignac number, because 20887755055 - 2³ = 20887755047 is a prime.

It is a super-2 number, since 2×20887755055² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20887754993 and 20887755011.

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, 47536 + ... + 209845.

It is an arithmetic number, because the mean of its divisors is an integer number (3133368468).

Almost surely, 2^20887755055 is an apocalyptic number.

20887755055 is a deficient number, since it is larger than the sum of its proper divisors (4179192689).

20887755055 is a wasteful number, since it uses less digits than its factorization.

20887755055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273617.

The product of its (nonzero) digits is 3920000, while the sum is 52.

The spelling of 20887755055 in words is "twenty billion, eight hundred eighty-seven million, seven hundred fifty-five thousand, fifty-five".