21017002 has 16 divisors (see below), whose sum is σ = 33609600. Its totient is φ = 9828000.

The previous prime is 21016997. The next prime is 21017027. The reversal of 21017002 is 20071012.

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, 499 + ... + 6502.

It is an arithmetic number, because the mean of its divisors is an integer number (2100600).

Almost surely, 2^21017002 is an apocalyptic number.

21017002 is a deficient number, since it is larger than the sum of its proper divisors (12592598).

21017002 is a wasteful number, since it uses less digits than its factorization.

21017002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7101.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 21017002 is about 4584.4303899176. The cubic root of 21017002 is about 275.9668534723.

Adding to 21017002 its reverse (20071012), we get a palindrome (41088014).

The spelling of 21017002 in words is "twenty-one million, seventeen thousand, two".