21260058 has 16 divisors (see below), whose sum is σ = 43557696. Its totient is φ = 6913760.

The previous prime is 21260051. The next prime is 21260077. The reversal of 21260058 is 85006212.

It is a Curzon number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42966 + ... + 43457.

It is an arithmetic number, because the mean of its divisors is an integer number (2722356).

Almost surely, 2^21260058 is an apocalyptic number.

21260058 is an abundant number, since it is smaller than the sum of its proper divisors (22297638).

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

21260058 is a wasteful number, since it uses less digits than its factorization.

21260058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86469.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 21260058 is about 4610.8630428587. The cubic root of 21260058 is about 277.0266062450.

The spelling of 21260058 in words is "twenty-one million, two hundred sixty thousand, fifty-eight".