20103091 has 2 divisors, whose sum is σ = 20103092. Its totient is φ = 20103090.

The previous prime is 20103071. The next prime is 20103101. The reversal of 20103091 is 19030102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20103091 - 2¹⁷ = 19972019 is a prime.

It is not a weakly prime, because it can be changed into another prime (20103071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051545 + 10051546.

It is an arithmetic number, because the mean of its divisors is an integer number (10051546).

Almost surely, 2^20103091 is an apocalyptic number.

20103091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20103091 is an equidigital number, since it uses as much as digits as its factorization.

20103091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 20103091 is about 4483.6470646116. The cubic root of 20103091 is about 271.9073493194.

Adding to 20103091 its reverse (19030102), we get a palindrome (39133193).

The spelling of 20103091 in words is "twenty million, one hundred three thousand, ninety-one".