20955181273 has 8 divisors (see below), whose sum is σ = 22578269000. Its totient is φ = 19333686528.

The previous prime is 20955181267. The next prime is 20955181333. The reversal of 20955181273 is 37218155902.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4498653184 + 16456528089 = 67072^2 + 128283^2 .

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

It is not a de Polignac number, because 20955181273 - 2²⁵ = 20921626841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20955181243) 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, 370848 + ... + 423601.

It is an arithmetic number, because the mean of its divisors is an integer number (2822283625).

Almost surely, 2^20955181273 is an apocalyptic number.

It is an amenable number.

20955181273 is a deficient number, since it is larger than the sum of its proper divisors (1623087727).

20955181273 is a wasteful number, since it uses less digits than its factorization.

20955181273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796491.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 20955181273 in words is "twenty billion, nine hundred fifty-five million, one hundred eighty-one thousand, two hundred seventy-three".