20103556 has 12 divisors (see below), whose sum is σ = 38379600. Its totient is φ = 9137960.

The previous prime is 20103553. The next prime is 20103599. The reversal of 20103556 is 65530102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (20103553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228406 + ... + 228493.

It is an arithmetic number, because the mean of its divisors is an integer number (3198300).

Almost surely, 2^20103556 is an apocalyptic number.

It is an amenable number.

20103556 is a deficient number, since it is larger than the sum of its proper divisors (18276044).

20103556 is a wasteful number, since it uses less digits than its factorization.

20103556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456914 (or 456912 counting only the distinct ones).

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

The square root of 20103556 is about 4483.6989194191. The cubic root of 20103556 is about 271.9094457788.

Adding to 20103556 its reverse (65530102), we get a palindrome (85633658).

The spelling of 20103556 in words is "twenty million, one hundred three thousand, five hundred fifty-six".