21262852 has 48 divisors (see below), whose sum is σ = 43182720. Its totient is φ = 9073152.

The previous prime is 21262849. The next prime is 21262853. The reversal of 21262852 is 25826212.

21262852 is nontrivially palindromic in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 21262852.

It is not an unprimeable number, because it can be changed into a prime (21262853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59049 + ... + 59407.

It is an arithmetic number, because the mean of its divisors is an integer number (899640).

Almost surely, 2^21262852 is an apocalyptic number.

It is an amenable number.

21262852 is an abundant number, since it is smaller than the sum of its proper divisors (21919868).

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

21262852 is a wasteful number, since it uses less digits than its factorization.

21262852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 458 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 21262852 is about 4611.1660130600. The cubic root of 21262852 is about 277.0387413394.

The spelling of 21262852 in words is "twenty-one million, two hundred sixty-two thousand, eight hundred fifty-two".