20103653 has 16 divisors (see below), whose sum is σ = 21954240. Its totient is φ = 18345600.

The previous prime is 20103647. The next prime is 20103659. The reversal of 20103653 is 35630102.

It is an interprime number because it is at equal distance from previous prime (20103647) and next prime (20103659).

It is a cyclic number.

It is not a de Polignac number, because 20103653 - 2⁴ = 20103637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101951 + ... + 102147.

It is an arithmetic number, because the mean of its divisors is an integer number (1372140).

Almost surely, 2^20103653 is an apocalyptic number.

It is an amenable number.

20103653 is a deficient number, since it is larger than the sum of its proper divisors (1850587).

20103653 is a wasteful number, since it uses less digits than its factorization.

20103653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 20103653 is about 4483.7097363679. The cubic root of 20103653 is about 271.9098831006.

Adding to 20103653 its reverse (35630102), we get a palindrome (55733755).

The spelling of 20103653 in words is "twenty million, one hundred three thousand, six hundred fifty-three".