20552479 has 2 divisors, whose sum is σ = 20552480. Its totient is φ = 20552478.

The previous prime is 20552449. The next prime is 20552491. The reversal of 20552479 is 97425502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20552479 - 2⁵ = 20552447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20552449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10276239 + 10276240.

It is an arithmetic number, because the mean of its divisors is an integer number (10276240).

Almost surely, 2^20552479 is an apocalyptic number.

20552479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20552479 is an equidigital number, since it uses as much as digits as its factorization.

20552479 is an odious number, because the sum of its binary digits is odd.

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

The square root of 20552479 is about 4533.4842009210. The cubic root of 20552479 is about 273.9185249789.

The spelling of 20552479 in words is "twenty million, five hundred fifty-two thousand, four hundred seventy-nine".