21260010 has 16 divisors (see below), whose sum is σ = 51024096. Its totient is φ = 5669328.

The previous prime is 21260003. The next prime is 21260011. The reversal of 21260010 is 1006212.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21260011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354304 + ... + 354363.

It is an arithmetic number, because the mean of its divisors is an integer number (3189006).

Almost surely, 2^21260010 is an apocalyptic number.

21260010 is an abundant number, since it is smaller than the sum of its proper divisors (29764086).

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

21260010 is a wasteful number, since it uses less digits than its factorization.

21260010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708677.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21260010 is about 4610.8578377564. The cubic root of 21260010 is about 277.0263977588.

Adding to 21260010 its reverse (1006212), we get a palindrome (22266222).

The spelling of 21260010 in words is "twenty-one million, two hundred sixty thousand, ten".