20682238 has 8 divisors (see below), whose sum is σ = 31221432. Its totient is φ = 10275096.

The previous prime is 20682199. The next prime is 20682247. The reversal of 20682238 is 83228602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32620 + ... + 33247.

It is an arithmetic number, because the mean of its divisors is an integer number (3902679).

Almost surely, 2^20682238 is an apocalyptic number.

20682238 is a deficient number, since it is larger than the sum of its proper divisors (10539194).

20682238 is a wasteful number, since it uses less digits than its factorization.

20682238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66026.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 20682238 is about 4547.7728615224. The cubic root of 20682238 is about 274.4937816758.

The spelling of 20682238 in words is "twenty million, six hundred eighty-two thousand, two hundred thirty-eight".