21118002 has 32 divisors (see below), whose sum is σ = 44433792. Its totient is φ = 6678144.

The previous prime is 21118001. The next prime is 21118007. The reversal of 21118002 is 20081112.

It is not an unprimeable number, because it can be changed into a prime (21118001) 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, 18348 + ... + 19464.

It is an arithmetic number, because the mean of its divisors is an integer number (1388556).

Almost surely, 2^21118002 is an apocalyptic number.

21118002 is an abundant number, since it is smaller than the sum of its proper divisors (23315790).

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

21118002 is a wasteful number, since it uses less digits than its factorization.

21118002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 21118002 is about 4595.4327326162. The cubic root of 21118002 is about 276.4082123690.

Adding to 21118002 its reverse (20081112), we get a palindrome (41199114).

The spelling of 21118002 in words is "twenty-one million, one hundred eighteen thousand, two".