20188073 has 2 divisors, whose sum is σ = 20188074. Its totient is φ = 20188072.

The previous prime is 20188067. The next prime is 20188081. The reversal of 20188073 is 37088102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20187049 + 1024 = 4493^2 + 32^2 .

It is a cyclic number.

It is not a de Polignac number, because 20188073 - 2⁴ = 20188057 is a prime.

It is not a weakly prime, because it can be changed into another prime (20188033) 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, 10094036 + 10094037.

It is an arithmetic number, because the mean of its divisors is an integer number (10094037).

Almost surely, 2^20188073 is an apocalyptic number.

It is an amenable number.

20188073 is a deficient number, since it is larger than the sum of its proper divisors (1).

20188073 is an equidigital number, since it uses as much as digits as its factorization.

20188073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 20188073 is about 4493.1139535961. The cubic root of 20188073 is about 272.2899562551.

Adding to 20188073 its sum of digits (29), we get a palindrome (20188102).

The spelling of 20188073 in words is "twenty million, one hundred eighty-eight thousand, seventy-three".