21002162 has 8 divisors (see below), whose sum is σ = 32354796. Its totient is φ = 10217232.

The previous prime is 21002129. The next prime is 21002203. The reversal of 21002162 is 26120012.

It can be written as a sum of positive squares in 2 ways, for example, as 16638241 + 4363921 = 4079^2 + 2089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141833 + ... + 141980.

Almost surely, 2^21002162 is an apocalyptic number.

21002162 is a deficient number, since it is larger than the sum of its proper divisors (11352634).

21002162 is a wasteful number, since it uses less digits than its factorization.

21002162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283852.

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

The square root of 21002162 is about 4582.8115824240. The cubic root of 21002162 is about 275.9018852403.

Adding to 21002162 its reverse (26120012), we get a palindrome (47122174).

The spelling of 21002162 in words is "twenty-one million, two thousand, one hundred sixty-two".