20103157 has 2 divisors, whose sum is σ = 20103158. Its totient is φ = 20103156.

The previous prime is 20103143. The next prime is 20103191. The reversal of 20103157 is 75130102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15476356 + 4626801 = 3934^2 + 2151^2 .

It is a cyclic number.

It is not a de Polignac number, because 20103157 - 2¹⁵ = 20070389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20103107) 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, 10051578 + 10051579.

It is an arithmetic number, because the mean of its divisors is an integer number (10051579).

Almost surely, 2^20103157 is an apocalyptic number.

It is an amenable number.

20103157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20103157 is an equidigital number, since it uses as much as digits as its factorization.

20103157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 20103157 is about 4483.6544246853. The cubic root of 20103157 is about 271.9076468833.

Adding to 20103157 its reverse (75130102), we get a palindrome (95233259).

The spelling of 20103157 in words is "twenty million, one hundred three thousand, one hundred fifty-seven".