20872603 has 2 divisors, whose sum is σ = 20872604. Its totient is φ = 20872602.

The previous prime is 20872601. The next prime is 20872613. The reversal of 20872603 is 30627802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20872603 - 2¹ = 20872601 is a prime.

Together with 20872601, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20872601) 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, 10436301 + 10436302.

It is an arithmetic number, because the mean of its divisors is an integer number (10436302).

Almost surely, 2^20872603 is an apocalyptic number.

20872603 is a deficient number, since it is larger than the sum of its proper divisors (1).

20872603 is an equidigital number, since it uses as much as digits as its factorization.

20872603 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 20872603 is about 4568.6543970846. The cubic root of 20872603 is about 275.3333830037. Note that the first 4 decimals are identical.

The spelling of 20872603 in words is "twenty million, eight hundred seventy-two thousand, six hundred three".