20905008710755 has 48 divisors (see below), whose sum is σ = 27585644109120. Its totient is φ = 15198616742400.

The previous prime is 20905008710749. The next prime is 20905008710779. The reversal of 20905008710755 is 55701780050902.

It is not a de Polignac number, because 20905008710755 - 2⁵ = 20905008710723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20905008710699 and 20905008710708.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42290725 + ... + 42782185.

It is an arithmetic number, because the mean of its divisors is an integer number (574700918940).

Almost surely, 2^{20905008710755} is an apocalyptic number.

20905008710755 is a deficient number, since it is larger than the sum of its proper divisors (6680635398365).

20905008710755 is a wasteful number, since it uses less digits than its factorization.

20905008710755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492272 (or 492259 counting only the distinct ones).

The product of its (nonzero) digits is 882000, while the sum is 49.

The spelling of 20905008710755 in words is "twenty trillion, nine hundred five billion, eight million, seven hundred ten thousand, seven hundred fifty-five".