20103450 has 48 divisors (see below), whose sum is σ = 50163456. Its totient is φ = 5328000.

The previous prime is 20103443. The next prime is 20103487. The reversal of 20103450 is 5430102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33150 + ... + 33750.

It is an arithmetic number, because the mean of its divisors is an integer number (1045072).

Almost surely, 2^20103450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20103450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25081728).

20103450 is an abundant number, since it is smaller than the sum of its proper divisors (30060006).

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

20103450 is a wasteful number, since it uses less digits than its factorization.

20103450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839 (or 834 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20103450 is about 4483.6870988061. The cubic root of 20103450 is about 271.9089678790.

Adding to 20103450 its reverse (5430102), we get a palindrome (25533552).

It can be divided in two parts, 2010 and 3450, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 20103450 in words is "twenty million, one hundred three thousand, four hundred fifty".