20955128363 has 16 divisors (see below), whose sum is σ = 22894534656. Its totient is φ = 19062734880.

The previous prime is 20955128281. The next prime is 20955128423. The reversal of 20955128363 is 36382155902.

It is a cyclic number.

It is not a de Polignac number, because 20955128363 - 2⁸ = 20955128107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20955118363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4116806 + ... + 4121892.

It is an arithmetic number, because the mean of its divisors is an integer number (1430908416).

Almost surely, 2^20955128363 is an apocalyptic number.

20955128363 is a deficient number, since it is larger than the sum of its proper divisors (1939406293).

20955128363 is a wasteful number, since it uses less digits than its factorization.

20955128363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9634.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 20955128363 in words is "twenty billion, nine hundred fifty-five million, one hundred twenty-eight thousand, three hundred sixty-three".