20300238 has 48 divisors (see below), whose sum is σ = 50519040. Its totient is φ = 5771088.

The previous prime is 20300233. The next prime is 20300239. The reversal of 20300238 is 83200302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20300238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20300233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46023 + ... + 46461.

It is an arithmetic number, because the mean of its divisors is an integer number (1052480).

Almost surely, 2^20300238 is an apocalyptic number.

20300238 is an abundant number, since it is smaller than the sum of its proper divisors (30218802).

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

20300238 is a wasteful number, since it uses less digits than its factorization.

20300238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20300238 is about 4505.5785422074. The cubic root of 20300238 is about 272.7933064952.

The spelling of 20300238 in words is "twenty million, three hundred thousand, two hundred thirty-eight".