20029547 has 2 divisors, whose sum is σ = 20029548. Its totient is φ = 20029546.

The previous prime is 20029531. The next prime is 20029561. The reversal of 20029547 is 74592002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20029547 - 2⁴ = 20029531 is a prime.

It is not a weakly prime, because it can be changed into another prime (20029147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10014773 + 10014774.

It is an arithmetic number, because the mean of its divisors is an integer number (10014774).

Almost surely, 2^20029547 is an apocalyptic number.

20029547 is a deficient number, since it is larger than the sum of its proper divisors (1).

20029547 is an equidigital number, since it uses as much as digits as its factorization.

20029547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20029547 is about 4475.4381908367. The cubic root of 20029547 is about 271.5753673825.

The spelling of 20029547 in words is "twenty million, twenty-nine thousand, five hundred forty-seven".