20430113 has 4 divisors (see below), whose sum is σ = 22287408. Its totient is φ = 18572820.

The previous prime is 20430083. The next prime is 20430121. The reversal of 20430113 is 31103402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20430113 - 2¹² = 20426017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20430143) 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, 928631 + ... + 928652.

It is an arithmetic number, because the mean of its divisors is an integer number (5571852).

Almost surely, 2^20430113 is an apocalyptic number.

It is an amenable number.

20430113 is a deficient number, since it is larger than the sum of its proper divisors (1857295).

20430113 is a wasteful number, since it uses less digits than its factorization.

20430113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857294.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20430113 is about 4519.9682521009. The cubic root of 20430113 is about 273.3738209243.

Adding to 20430113 its reverse (31103402), we get a palindrome (51533515).

Subtracting 20430113 from its reverse (31103402), we obtain a square (10673289 = 3267²).

The spelling of 20430113 in words is "twenty million, four hundred thirty thousand, one hundred thirteen".