20623087 has 2 divisors, whose sum is σ = 20623088. Its totient is φ = 20623086.

The previous prime is 20623081. The next prime is 20623103. The reversal of 20623087 is 78032602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20623087 - 2³ = 20623079 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20623081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10311543 + 10311544.

It is an arithmetic number, because the mean of its divisors is an integer number (10311544).

Almost surely, 2^20623087 is an apocalyptic number.

20623087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20623087 is an equidigital number, since it uses as much as digits as its factorization.

20623087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20623087 is about 4541.2649118940. The cubic root of 20623087 is about 274.2318486242.

Adding to 20623087 its reverse (78032602), we get a palindrome (98655689).

The spelling of 20623087 in words is "twenty million, six hundred twenty-three thousand, eighty-seven".