20485547 has 2 divisors, whose sum is σ = 20485548. Its totient is φ = 20485546.

The previous prime is 20485541. The next prime is 20485601. The reversal of 20485547 is 74558402.

20485547 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20485547 - 2⁶ = 20485483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20485541) 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, 10242773 + 10242774.

It is an arithmetic number, because the mean of its divisors is an integer number (10242774).

Almost surely, 2^20485547 is an apocalyptic number.

20485547 is a deficient number, since it is larger than the sum of its proper divisors (1).

20485547 is an equidigital number, since it uses as much as digits as its factorization.

20485547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 20485547 is about 4526.0962208066. The cubic root of 20485547 is about 273.6208503754.

The spelling of 20485547 in words is "twenty million, four hundred eighty-five thousand, five hundred forty-seven".