20640462103 has 2 divisors, whose sum is σ = 20640462104. Its totient is φ = 20640462102.

The previous prime is 20640461977. The next prime is 20640462107. The reversal of 20640462103 is 30126404602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20640462103 - 2⁹ = 20640461591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20640462107) 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, 10320231051 + 10320231052.

It is an arithmetic number, because the mean of its divisors is an integer number (10320231052).

Almost surely, 2^20640462103 is an apocalyptic number.

20640462103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20640462103 is an equidigital number, since it uses as much as digits as its factorization.

20640462103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 20640462103 its reverse (30126404602), we get a palindrome (50766866705).

The spelling of 20640462103 in words is "twenty billion, six hundred forty million, four hundred sixty-two thousand, one hundred three".