21162002 has 24 divisors (see below), whose sum is σ = 33430320. Its totient is φ = 10043280.

The previous prime is 21161983. The next prime is 21162007. The reversal of 21162002 is 20026112.

It is not an unprimeable number, because it can be changed into a prime (21162007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161477 + ... + 161607.

It is an arithmetic number, because the mean of its divisors is an integer number (1392930).

Almost surely, 2^21162002 is an apocalyptic number.

21162002 is a deficient number, since it is larger than the sum of its proper divisors (12268318).

21162002 is a wasteful number, since it uses less digits than its factorization.

21162002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21162002 is about 4600.2176035488. The cubic root of 21162002 is about 276.6000475073.

Adding to 21162002 its reverse (20026112), we get a palindrome (41188114).

The spelling of 21162002 in words is "twenty-one million, one hundred sixty-two thousand, two".