20001073 has 2 divisors, whose sum is σ = 20001074. Its totient is φ = 20001072.

The previous prime is 20001067. The next prime is 20001083. The reversal of 20001073 is 37010002.

20001073 is nontrivially palindromic in base 4 and base 16.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18173169 + 1827904 = 4263^2 + 1352^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001073 - 2¹³ = 19992881 is a prime.

20001073 is an undulating number in base 16.

It is not a weakly prime, because it can be changed into another prime (20001083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000536 + 10000537.

It is an arithmetic number, because the mean of its divisors is an integer number (10000537).

Almost surely, 2^20001073 is an apocalyptic number.

It is an amenable number.

20001073 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001073 is an equidigital number, since it uses as much as digits as its factorization.

20001073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 20001073 is about 4472.2559184376. The cubic root of 20001073 is about 271.4466158562.

Adding to 20001073 its reverse (37010002), we get a palindrome (57011075).

The spelling of 20001073 in words is "twenty million, one thousand, seventy-three".