20672238 has 32 divisors (see below), whose sum is σ = 43973280. Its totient is φ = 6456320.

The previous prime is 20672237. The next prime is 20672261. The reversal of 20672238 is 83227602.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20672231) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 39418 + ... + 39938.

It is an arithmetic number, because the mean of its divisors is an integer number (1374165).

Almost surely, 2^20672238 is an apocalyptic number.

20672238 is an abundant number, since it is smaller than the sum of its proper divisors (23301042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20672238 is a wasteful number, since it uses less digits than its factorization.

20672238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20672238 is about 4546.6732893402. The cubic root of 20672238 is about 274.4495346858.

It can be divided in two parts, 20672 and 238, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20672238 in words is "twenty million, six hundred seventy-two thousand, two hundred thirty-eight".