20567479 has 2 divisors, whose sum is σ = 20567480. Its totient is φ = 20567478.

The previous prime is 20567441. The next prime is 20567489. The reversal of 20567479 is 97476502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20567479 - 2⁹ = 20566967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20567429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10283739 + 10283740.

It is an arithmetic number, because the mean of its divisors is an integer number (10283740).

Almost surely, 2^20567479 is an apocalyptic number.

20567479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20567479 is an equidigital number, since it uses as much as digits as its factorization.

20567479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 20567479 is about 4535.1382558859. The cubic root of 20567479 is about 273.9851475779.

The spelling of 20567479 in words is "twenty million, five hundred sixty-seven thousand, four hundred seventy-nine".