20155073 has 2 divisors, whose sum is σ = 20155074. Its totient is φ = 20155072.

The previous prime is 20155039. The next prime is 20155097. The reversal of 20155073 is 37055102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20133169 + 21904 = 4487^2 + 148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20155073 is a prime.

It is not a weakly prime, because it can be changed into another prime (20152073) 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, 10077536 + 10077537.

It is an arithmetic number, because the mean of its divisors is an integer number (10077537).

Almost surely, 2^20155073 is an apocalyptic number.

It is an amenable number.

20155073 is a deficient number, since it is larger than the sum of its proper divisors (1).

20155073 is an equidigital number, since it uses as much as digits as its factorization.

20155073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 20155073 is about 4489.4401655440. The cubic root of 20155073 is about 272.1415110315.

The spelling of 20155073 in words is "twenty million, one hundred fifty-five thousand, seventy-three".