20623133 has 2 divisors, whose sum is σ = 20623134. Its totient is φ = 20623132.

The previous prime is 20623129. The next prime is 20623139. The reversal of 20623133 is 33132602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14462809 + 6160324 = 3803^2 + 2482^2 .

It is a cyclic number.

It is not a de Polignac number, because 20623133 - 2² = 20623129 is a prime.

It is a super-2 number, since 2×20623133² = 850627229471378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20623139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10311566 + 10311567.

It is an arithmetic number, because the mean of its divisors is an integer number (10311567).

Almost surely, 2^20623133 is an apocalyptic number.

It is an amenable number.

20623133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20623133 is an equidigital number, since it uses as much as digits as its factorization.

20623133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 20623133 is about 4541.2699765594. The cubic root of 20623133 is about 274.2320525163.

Adding to 20623133 its reverse (33132602), we get a palindrome (53755735).

The spelling of 20623133 in words is "twenty million, six hundred twenty-three thousand, one hundred thirty-three".