20213332 has 12 divisors (see below), whose sum is σ = 35724276. Its totient is φ = 10006400.

The previous prime is 20213317. The next prime is 20213351. The reversal of 20213332 is 23331202.

It can be written as a sum of positive squares in 2 ways, for example, as 9947716 + 10265616 = 3154^2 + 3204^2 .

It is a congruent number.

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, 24613 + ... + 25420.

It is an arithmetic number, because the mean of its divisors is an integer number (2977023).

Almost surely, 2^20213332 is an apocalyptic number.

It is an amenable number.

20213332 is a deficient number, since it is larger than the sum of its proper divisors (15510944).

20213332 is a wasteful number, since it uses less digits than its factorization.

20213332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50138 (or 50136 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20213332 is about 4495.9239317408. The cubic root of 20213332 is about 272.4034705653.

Adding to 20213332 its reverse (23331202), we get a palindrome (43544534).

The spelling of 20213332 in words is "twenty million, two hundred thirteen thousand, three hundred thirty-two".