20612723 has 2 divisors, whose sum is σ = 20612724. Its totient is φ = 20612722.

The previous prime is 20612717. The next prime is 20612741. The reversal of 20612723 is 32721602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20612723 - 2⁶ = 20612659 is a prime.

It is not a weakly prime, because it can be changed into another prime (20212723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10306361 + 10306362.

It is an arithmetic number, because the mean of its divisors is an integer number (10306362).

Almost surely, 2^20612723 is an apocalyptic number.

20612723 is a deficient number, since it is larger than the sum of its proper divisors (1).

20612723 is an equidigital number, since it uses as much as digits as its factorization.

20612723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20612723 is about 4540.1236767295. The cubic root of 20612723 is about 274.1859031083.

It can be divided in two parts, 2061272 and 3, that multiplied together give a palindrome (6183816).

The spelling of 20612723 in words is "twenty million, six hundred twelve thousand, seven hundred twenty-three".