20554279 has 2 divisors, whose sum is σ = 20554280. Its totient is φ = 20554278.

The previous prime is 20554253. The next prime is 20554291. The reversal of 20554279 is 97245502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20554279 - 2⁷ = 20554151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20554229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277139 + 10277140.

It is an arithmetic number, because the mean of its divisors is an integer number (10277140).

Almost surely, 2^20554279 is an apocalyptic number.

20554279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20554279 is an equidigital number, since it uses as much as digits as its factorization.

20554279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 20554279 is about 4533.6827193795. The cubic root of 20554279 is about 273.9265214020.

The spelling of 20554279 in words is "twenty million, five hundred fifty-four thousand, two hundred seventy-nine".