20056147 has 2 divisors, whose sum is σ = 20056148. Its totient is φ = 20056146.

The previous prime is 20056123. The next prime is 20056177. The reversal of 20056147 is 74165002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20056147 - 2¹⁵ = 20023379 is a prime.

It is not a weakly prime, because it can be changed into another prime (20056177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10028073 + 10028074.

It is an arithmetic number, because the mean of its divisors is an integer number (10028074).

Almost surely, 2^20056147 is an apocalyptic number.

20056147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20056147 is an equidigital number, since it uses as much as digits as its factorization.

20056147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20056147 is about 4478.4089808770. The cubic root of 20056147 is about 271.6955350071.

The spelling of 20056147 in words is "twenty million, fifty-six thousand, one hundred forty-seven".