20103655 has 32 divisors (see below), whose sum is σ = 29288448. Its totient is φ = 13046400.

The previous prime is 20103647. The next prime is 20103659. The reversal of 20103655 is 55630102.

It is a happy number.

It is not a de Polignac number, because 20103655 - 2³ = 20103647 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21712 + ... + 22618.

It is an arithmetic number, because the mean of its divisors is an integer number (915264).

Almost surely, 2^20103655 is an apocalyptic number.

20103655 is a deficient number, since it is larger than the sum of its proper divisors (9184793).

20103655 is a wasteful number, since it uses less digits than its factorization.

20103655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 20103655 is about 4483.7099593975. The cubic root of 20103655 is about 271.9098921176.

Adding to 20103655 its reverse (55630102), we get a palindrome (75733757).

It can be divided in two parts, 2010 and 3655, that added together give a palindrome (5665).

The spelling of 20103655 in words is "twenty million, one hundred three thousand, six hundred fifty-five".