20021338 has 8 divisors (see below), whose sum is σ = 30307860. Its totient is φ = 9918720.

The previous prime is 20021327. The next prime is 20021341. The reversal of 20021338 is 83312002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18515809 + 1505529 = 4303^2 + 1227^2 .

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, 45703 + ... + 46138.

Almost surely, 2^20021338 is an apocalyptic number.

20021338 is a deficient number, since it is larger than the sum of its proper divisors (10286522).

20021338 is a wasteful number, since it uses less digits than its factorization.

20021338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91952.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20021338 is about 4474.5209799486. The cubic root of 20021338 is about 271.5382610877.

The spelling of 20021338 in words is "twenty million, twenty-one thousand, three hundred thirty-eight".