20547427 has 2 divisors, whose sum is σ = 20547428. Its totient is φ = 20547426.

The previous prime is 20547409. The next prime is 20547431. The reversal of 20547427 is 72474502.

20547427 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20547427 - 2¹¹ = 20545379 is a prime.

It is not a weakly prime, because it can be changed into another prime (20547467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10273713 + 10273714.

It is an arithmetic number, because the mean of its divisors is an integer number (10273714).

Almost surely, 2^20547427 is an apocalyptic number.

20547427 is a deficient number, since it is larger than the sum of its proper divisors (1).

20547427 is an equidigital number, since it uses as much as digits as its factorization.

20547427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 20547427 is about 4532.9269793369. The cubic root of 20547427 is about 273.8960791904.

The spelling of 20547427 in words is "twenty million, five hundred forty-seven thousand, four hundred twenty-seven".