20021336 has 8 divisors (see below), whose sum is σ = 37540020. Its totient is φ = 10010664.

The previous prime is 20021327. The next prime is 20021341. The reversal of 20021336 is 63312002.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1251326 + ... + 1251341.

Almost surely, 2^20021336 is an apocalyptic number.

It is an amenable number.

20021336 is a deficient number, since it is larger than the sum of its proper divisors (17518684).

20021336 is a wasteful number, since it uses less digits than its factorization.

20021336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502673 (or 2502669 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 20021336 is about 4474.5207564610. The cubic root of 20021336 is about 271.5382520461.

Adding to 20021336 its reverse (63312002), we get a palindrome (83333338).

The spelling of 20021336 in words is "twenty million, twenty-one thousand, three hundred thirty-six".