20103552 has 160 divisors (see below), whose sum is σ = 68621520. Its totient is φ = 5723136.

The previous prime is 20103547. The next prime is 20103553. The reversal of 20103552 is 25530102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 72438 + ... + 72714.

Almost surely, 2^20103552 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 20103552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34310760).

20103552 is an abundant number, since it is smaller than the sum of its proper divisors (48517968).

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

20103552 is an equidigital number, since it uses as much as digits as its factorization.

20103552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 20103552 is about 4483.6984733588. The cubic root of 20103552 is about 271.9094277448.

Adding to 20103552 its reverse (25530102), we get a palindrome (45633654).

The spelling of 20103552 in words is "twenty million, one hundred three thousand, five hundred fifty-two".