20874338 has 4 divisors (see below), whose sum is σ = 31311510. Its totient is φ = 10437168.

The previous prime is 20874323. The next prime is 20874349. The reversal of 20874338 is 83347802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19070689 + 1803649 = 4367^2 + 1343^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20874298 and 20874307.

It is an unprimeable number.

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, 5218583 + ... + 5218586.

Almost surely, 2^20874338 is an apocalyptic number.

20874338 is a deficient number, since it is larger than the sum of its proper divisors (10437172).

20874338 is a wasteful number, since it uses less digits than its factorization.

20874338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10437171.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 20874338 is about 4568.8442739932. The cubic root of 20874338 is about 275.3410116670.

It can be divided in two parts, 20874 and 338, that added together give a palindrome (21212).

The spelling of 20874338 in words is "twenty million, eight hundred seventy-four thousand, three hundred thirty-eight".