21203050 has 48 divisors (see below), whose sum is σ = 45309600. Its totient is φ = 7300800.

The previous prime is 21203041. The next prime is 21203071. The reversal of 21203050 is 5030212.

It is a self number, because there is not a number n which added to its sum of digits gives 21203050.

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, 9436 + ... + 11464.

It is an arithmetic number, because the mean of its divisors is an integer number (943950).

Almost surely, 2^21203050 is an apocalyptic number.

21203050 is an abundant number, since it is smaller than the sum of its proper divisors (24106550).

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

21203050 is a wasteful number, since it uses less digits than its factorization.

21203050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071 (or 2066 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 21203050 is about 4604.6769702119. The cubic root of 21203050 is about 276.7787726518.

Adding to 21203050 its reverse (5030212), we get a palindrome (26233262).

The spelling of 21203050 in words is "twenty-one million, two hundred three thousand, fifty".