20872238 has 8 divisors (see below), whose sum is σ = 32318400. Its totient is φ = 10099440.

The previous prime is 20872219. The next prime is 20872249. The reversal of 20872238 is 83227802.

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

It is a Curzon number.

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, 168263 + ... + 168386.

It is an arithmetic number, because the mean of its divisors is an integer number (4039800).

Almost surely, 2^20872238 is an apocalyptic number.

20872238 is a deficient number, since it is larger than the sum of its proper divisors (11446162).

20872238 is a wasteful number, since it uses less digits than its factorization.

20872238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336682.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 20872238 is about 4568.6144507936. The cubic root of 20872238 is about 275.3317780726.

The spelling of 20872238 in words is "twenty million, eight hundred seventy-two thousand, two hundred thirty-eight".