21035002 has 4 divisors (see below), whose sum is σ = 31552506. Its totient is φ = 10517500.

The previous prime is 21034999. The next prime is 21035029. The reversal of 21035002 is 20053012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20331081 + 703921 = 4509^2 + 839^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5258749 + ... + 5258752.

Almost surely, 2^21035002 is an apocalyptic number.

21035002 is a deficient number, since it is larger than the sum of its proper divisors (10517504).

21035002 is a wasteful number, since it uses less digits than its factorization.

21035002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10517503.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 21035002 is about 4586.3931362237. The cubic root of 21035002 is about 276.0456148790.

Adding to 21035002 its reverse (20053012), we get a palindrome (41088014).

The spelling of 21035002 in words is "twenty-one million, thirty-five thousand, two".