21258202 has 16 divisors (see below), whose sum is σ = 37428480. Its totient is φ = 8864208.

The previous prime is 21258199. The next prime is 21258253. The reversal of 21258202 is 20285212.

It is a super-2 number, since 2×21258202² = 903822304545608, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20002 + ... + 21037.

It is an arithmetic number, because the mean of its divisors is an integer number (2339280).

Almost surely, 2^21258202 is an apocalyptic number.

21258202 is a deficient number, since it is larger than the sum of its proper divisors (16170278).

21258202 is a wasteful number, since it uses less digits than its factorization.

21258202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41085.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 21258202 is about 4610.6617746263. The cubic root of 21258202 is about 277.0185445495.

The spelling of 21258202 in words is "twenty-one million, two hundred fifty-eight thousand, two hundred two".