20655501011 has 8 divisors (see below), whose sum is σ = 20873601504. Its totient is φ = 20437667200.

The previous prime is 20655500977. The next prime is 20655501017. The reversal of 20655501011 is 11010555602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20655501011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20655501017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91010 + ... + 222696.

It is an arithmetic number, because the mean of its divisors is an integer number (2609200188).

Almost surely, 2^20655501011 is an apocalyptic number.

20655501011 is a deficient number, since it is larger than the sum of its proper divisors (218100493).

20655501011 is a wasteful number, since it uses less digits than its factorization.

20655501011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133341.

The product of its (nonzero) digits is 1500, while the sum is 26.

The spelling of 20655501011 in words is "twenty billion, six hundred fifty-five million, five hundred one thousand, eleven".