21245200050 has 96 divisors (see below), whose sum is σ = 58213095552. Its totient is φ = 5100282880.

The previous prime is 21245200019. The next prime is 21245200063. The reversal of 21245200050 is 5000254212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122469 + ... + 239768.

It is an arithmetic number, because the mean of its divisors is an integer number (606386412).

Almost surely, 2^21245200050 is an apocalyptic number.

21245200050 is an abundant number, since it is smaller than the sum of its proper divisors (36967895502).

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

21245200050 is a wasteful number, since it uses less digits than its factorization.

21245200050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362292 (or 362287 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 21245200050 its reverse (5000254212), we get a palindrome (26245454262).

The spelling of 21245200050 in words is "twenty-one billion, two hundred forty-five million, two hundred thousand, fifty".