21080050 has 24 divisors (see below), whose sum is σ = 39451716. Its totient is φ = 8379840.

The previous prime is 21080041. The next prime is 21080057. The reversal of 21080050 is 5008012.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 17631601 + 3448449 = 4199^2 + 1857^2 .

It is not an unprimeable number, because it can be changed into a prime (21080057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7432 + ... + 9868.

Almost surely, 2^21080050 is an apocalyptic number.

21080050 is a deficient number, since it is larger than the sum of its proper divisors (18371666).

21080050 is a wasteful number, since it uses less digits than its factorization.

21080050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622 (or 2617 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 21080050 is about 4591.3015583819. The cubic root of 21080050 is about 276.2425316873.

Adding to 21080050 its reverse (5008012), we get a palindrome (26088062).

The spelling of 21080050 in words is "twenty-one million, eighty thousand, fifty".