20103493 has 2 divisors, whose sum is σ = 20103494. Its totient is φ = 20103492.

The previous prime is 20103487. The next prime is 20103509. The reversal of 20103493 is 39430102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14424804 + 5678689 = 3798^2 + 2383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20103493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20103443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051746 + 10051747.

It is an arithmetic number, because the mean of its divisors is an integer number (10051747).

Almost surely, 2^20103493 is an apocalyptic number.

It is an amenable number.

20103493 is a deficient number, since it is larger than the sum of its proper divisors (1).

20103493 is an equidigital number, since it uses as much as digits as its factorization.

20103493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20103493 is about 4483.6918939642. The cubic root of 20103493 is about 271.9091617442.

Adding to 20103493 its reverse (39430102), we get a palindrome (59533595).

The spelling of 20103493 in words is "twenty million, one hundred three thousand, four hundred ninety-three".