20103612 has 48 divisors (see below), whose sum is σ = 49744800. Its totient is φ = 6307840.

The previous prime is 20103607. The next prime is 20103613. The reversal of 20103612 is 21630102.

It is a junction number, because it is equal to n+sod(n) for n = 20103591 and 20103600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103613) 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, 13564 + ... + 14972.

It is an arithmetic number, because the mean of its divisors is an integer number (1036350).

Almost surely, 2^20103612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20103612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24872400).

20103612 is an abundant number, since it is smaller than the sum of its proper divisors (29641188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20103612 is a wasteful number, since it uses less digits than its factorization.

20103612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486 (or 1484 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 20103612 is about 4483.7051642587. The cubic root of 20103612 is about 271.9096982534.

Adding to 20103612 its reverse (21630102), we get a palindrome (41733714).

The spelling of 20103612 in words is "twenty million, one hundred three thousand, six hundred twelve".