20730238 has 8 divisors (see below), whose sum is σ = 31168800. Its totient is φ = 10340640.

The previous prime is 20730233. The next prime is 20730239. The reversal of 20730238 is 83203702.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20730233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11163 + ... + 12886.

It is an arithmetic number, because the mean of its divisors is an integer number (3896100).

Almost surely, 2^20730238 is an apocalyptic number.

20730238 is a deficient number, since it is larger than the sum of its proper divisors (10438562).

20730238 is a wasteful number, since it uses less digits than its factorization.

20730238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24482.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20730238 is about 4553.0471115507. The cubic root of 20730238 is about 274.7059689285.

The spelling of 20730238 in words is "twenty million, seven hundred thirty thousand, two hundred thirty-eight".