21954119163227 has 2 divisors, whose sum is σ = 21954119163228. Its totient is φ = 21954119163226.

The previous prime is 21954119163181. The next prime is 21954119163271. The reversal of 21954119163227 is 72236191145912.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21954119163227 - 2²⁴ = 21954102386011 is a prime.

It is not a weakly prime, because it can be changed into another prime (21954119163827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10977059581613 + 10977059581614.

It is an arithmetic number, because the mean of its divisors is an integer number (10977059581614).

Almost surely, 2^{21954119163227} is an apocalyptic number.

21954119163227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21954119163227 is an equidigital number, since it uses as much as digits as its factorization.

21954119163227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 53.

The spelling of 21954119163227 in words is "twenty-one trillion, nine hundred fifty-four billion, one hundred nineteen million, one hundred sixty-three thousand, two hundred twenty-seven".