20749103 has 2 divisors, whose sum is σ = 20749104. Its totient is φ = 20749102.

The previous prime is 20749073. The next prime is 20749117. The reversal of 20749103 is 30194702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20749103 - 2⁶ = 20749039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20749303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10374551 + 10374552.

It is an arithmetic number, because the mean of its divisors is an integer number (10374552).

Almost surely, 2^20749103 is an apocalyptic number.

20749103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20749103 is an equidigital number, since it uses as much as digits as its factorization.

20749103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20749103 is about 4555.1183299669. The cubic root of 20749103 is about 274.7892732765.

The spelling of 20749103 in words is "twenty million, seven hundred forty-nine thousand, one hundred three".