20338772 has 6 divisors (see below), whose sum is σ = 35592858. Its totient is φ = 10169384.

The previous prime is 20338771. The next prime is 20338777. The reversal of 20338772 is 27783302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11600836 + 8737936 = 3406^2 + 2956^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20338771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2542343 + ... + 2542350.

It is an arithmetic number, because the mean of its divisors is an integer number (5932143).

Almost surely, 2^20338772 is an apocalyptic number.

It is an amenable number.

20338772 is a deficient number, since it is larger than the sum of its proper divisors (15254086).

20338772 is a wasteful number, since it uses less digits than its factorization.

20338772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084697 (or 5084695 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 20338772 is about 4509.8527692154. The cubic root of 20338772 is about 272.9658032099.

The spelling of 20338772 in words is "twenty million, three hundred thirty-eight thousand, seven hundred seventy-two".