21202010 has 16 divisors (see below), whose sum is σ = 39051936. Its totient is φ = 8283408.

The previous prime is 21202003. The next prime is 21202033. The reversal of 21202010 is 1020212.

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, 24224 + ... + 25083.

It is an arithmetic number, because the mean of its divisors is an integer number (2440746).

Almost surely, 2^21202010 is an apocalyptic number.

21202010 is a deficient number, since it is larger than the sum of its proper divisors (17849926).

21202010 is a wasteful number, since it uses less digits than its factorization.

21202010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49357.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 21202010 is about 4604.5640401671. The cubic root of 21202010 is about 276.7742472867.

Adding to 21202010 its reverse (1020212), we get a palindrome (22222222).

The spelling of 21202010 in words is "twenty-one million, two hundred two thousand, ten".