21201802 has 8 divisors (see below), whose sum is σ = 32402916. Its totient is φ = 10400832.

The previous prime is 21201787. The next prime is 21201811. The reversal of 21201802 is 20810212.

It can be written as a sum of positive squares in 2 ways, for example, as 20875761 + 326041 = 4569^2 + 571^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99903 + ... + 100114.

Almost surely, 2^21201802 is an apocalyptic number.

21201802 is a deficient number, since it is larger than the sum of its proper divisors (11201114).

21201802 is a wasteful number, since it uses less digits than its factorization.

21201802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200072.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 21201802 is about 4604.5414538258. The cubic root of 21201802 is about 276.7733421959.

The spelling of 21201802 in words is "twenty-one million, two hundred one thousand, eight hundred two".