21862002 has 16 divisors (see below), whose sum is σ = 43771392. Its totient is φ = 7279440.

The previous prime is 21861991. The next prime is 21862031. The reversal of 21862002 is 20026812.

It is a self number, because there is not a number n which added to its sum of digits gives 21862002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7588 + ... + 10064.

It is an arithmetic number, because the mean of its divisors is an integer number (2735712).

Almost surely, 2^21862002 is an apocalyptic number.

21862002 is an abundant number, since it is smaller than the sum of its proper divisors (21909390).

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

21862002 is a wasteful number, since it uses less digits than its factorization.

21862002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3953.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 21862002 is about 4675.6819823423. The cubic root of 21862002 is about 279.6168313305.

Adding to 21862002 its reverse (20026812), we get a palindrome (41888814).

The spelling of 21862002 in words is "twenty-one million, eight hundred sixty-two thousand, two".