20243430 has 96 divisors (see below), whose sum is σ = 56710368. Its totient is φ = 4992000.

The previous prime is 20243407. The next prime is 20243467. The reversal of 20243430 is 3434202.

20243430 is a `hidden beast` number, since 202 + 434 + 30 = 666.

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

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 47 ways as a sum of consecutive naturals, for example, 154465 + ... + 154595.

It is an arithmetic number, because the mean of its divisors is an integer number (590733).

Almost surely, 2^20243430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20243430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28355184).

20243430 is an abundant number, since it is smaller than the sum of its proper divisors (36466938).

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

20243430 is a wasteful number, since it uses less digits than its factorization.

20243430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 20243430 is about 4499.2699407793. The cubic root of 20243430 is about 272.5386080022.

Adding to 20243430 its reverse (3434202), we get a palindrome (23677632).

The spelling of 20243430 in words is "twenty million, two hundred forty-three thousand, four hundred thirty".