20602123 has 2 divisors, whose sum is σ = 20602124. Its totient is φ = 20602122.

The previous prime is 20602103. The next prime is 20602157. The reversal of 20602123 is 32120602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20602123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20602097 and 20602106.

It is not a weakly prime, because it can be changed into another prime (20602103) 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, 10301061 + 10301062.

It is an arithmetic number, because the mean of its divisors is an integer number (10301062).

Almost surely, 2^20602123 is an apocalyptic number.

20602123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20602123 is an equidigital number, since it uses as much as digits as its factorization.

20602123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20602123 is about 4538.9561575323. The cubic root of 20602123 is about 274.1388954275.

Adding to 20602123 its reverse (32120602), we get a palindrome (52722725).

The spelling of 20602123 in words is "twenty million, six hundred two thousand, one hundred twenty-three".