21260050 has 96 divisors (see below), whose sum is σ = 49996800. Its totient is φ = 6557760.

The previous prime is 21260039. The next prime is 21260051. The reversal of 21260050 is 5006212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21260051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 152881 + ... + 153019.

It is an arithmetic number, because the mean of its divisors is an integer number (520800).

Almost surely, 2^21260050 is an apocalyptic number.

21260050 is an abundant number, since it is smaller than the sum of its proper divisors (28736750).

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

21260050 is a wasteful number, since it uses less digits than its factorization.

21260050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 21260050 is about 4610.8621753420. The cubic root of 21260050 is about 277.0265714973.

Adding to 21260050 its reverse (5006212), we get a palindrome (26266262).

The spelling of 21260050 in words is "twenty-one million, two hundred sixty thousand, fifty".