21093554370277 has 4 divisors (see below), whose sum is σ = 21093932982636. Its totient is φ = 21093175757920.

The previous prime is 21093554370269. The next prime is 21093554370293. The reversal of 21093554370277 is 77207345539012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19082691403876 + 2010862966401 = 4368374^2 + 1418049^2 .

It is a cyclic number.

It is not a de Polignac number, because 21093554370277 - 2³ = 21093554370269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21093554371277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189222598 + ... + 189334039.

It is an arithmetic number, because the mean of its divisors is an integer number (5273483245659).

Almost surely, 2^{21093554370277} is an apocalyptic number.

It is an amenable number.

21093554370277 is a deficient number, since it is larger than the sum of its proper divisors (378612359).

21093554370277 is an equidigital number, since it uses as much as digits as its factorization.

21093554370277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378612358.

The product of its (nonzero) digits is 11113200, while the sum is 55.

The spelling of 21093554370277 in words is "twenty-one trillion, ninety-three billion, five hundred fifty-four million, three hundred seventy thousand, two hundred seventy-seven".