20454911 has 2 divisors, whose sum is σ = 20454912. Its totient is φ = 20454910.

The previous prime is 20454901. The next prime is 20454923. The reversal of 20454911 is 11945402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20454911 - 2¹⁰ = 20453887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20454901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10227455 + 10227456.

It is an arithmetic number, because the mean of its divisors is an integer number (10227456).

Almost surely, 2^20454911 is an apocalyptic number.

20454911 is a deficient number, since it is larger than the sum of its proper divisors (1).

20454911 is an equidigital number, since it uses as much as digits as its factorization.

20454911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 20454911 is about 4522.7105810565. The cubic root of 20454911 is about 273.4843829336.

The spelling of 20454911 in words is "twenty million, four hundred fifty-four thousand, nine hundred eleven".