20103723 has 6 divisors (see below), whose sum is σ = 29038724. Its totient is φ = 13402476.

The previous prime is 20103701. The next prime is 20103737. The reversal of 20103723 is 32730102.

It is not a de Polignac number, because 20103723 - 2⁶ = 20103659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20103696 and 20103705.

It is not an unprimeable number, because it can be changed into a prime (20103763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1116865 + ... + 1116882.

Almost surely, 2^20103723 is an apocalyptic number.

20103723 is a deficient number, since it is larger than the sum of its proper divisors (8935001).

20103723 is a wasteful number, since it uses less digits than its factorization.

20103723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233753 (or 2233750 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 20103723 is about 4483.7175423972. The cubic root of 20103723 is about 271.9101986929.

Adding to 20103723 its reverse (32730102), we get a palindrome (52833825).

The spelling of 20103723 in words is "twenty million, one hundred three thousand, seven hundred twenty-three".