20727073 has 2 divisors, whose sum is σ = 20727074. Its totient is φ = 20727072.

The previous prime is 20727061. The next prime is 20727089. The reversal of 20727073 is 37072702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16916769 + 3810304 = 4113^2 + 1952^2 .

It is a cyclic number.

It is not a de Polignac number, because 20727073 - 2²¹ = 18629921 is a prime.

It is a super-2 number, since 2×20727073² = 859223110294658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20727023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10363536 + 10363537.

It is an arithmetic number, because the mean of its divisors is an integer number (10363537).

Almost surely, 2^20727073 is an apocalyptic number.

It is an amenable number.

20727073 is a deficient number, since it is larger than the sum of its proper divisors (1).

20727073 is an equidigital number, since it uses as much as digits as its factorization.

20727073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4116, while the sum is 28.

The square root of 20727073 is about 4552.6995288510. The cubic root of 20727073 is about 274.6919879241.

Adding to 20727073 its reverse (37072702), we get a palindrome (57799775).

The spelling of 20727073 in words is "twenty million, seven hundred twenty-seven thousand, seventy-three".