20403093 has 32 divisors (see below), whose sum is σ = 30412800. Its totient is φ = 12108096.

The previous prime is 20403083. The next prime is 20403121. The reversal of 20403093 is 39030402.

It is not a de Polignac number, because 20403093 - 2⁹ = 20402581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20403013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103471 + ... + 103667.

It is an arithmetic number, because the mean of its divisors is an integer number (950400).

Almost surely, 2^20403093 is an apocalyptic number.

20403093 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20403093 is a deficient number, since it is larger than the sum of its proper divisors (10009707).

20403093 is a wasteful number, since it uses less digits than its factorization.

20403093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 20403093 is about 4516.9783041321. The cubic root of 20403093 is about 273.2532502187.

Adding to 20403093 its reverse (39030402), we get a palindrome (59433495).

The spelling of 20403093 in words is "twenty million, four hundred three thousand, ninety-three".