20430005 has 8 divisors (see below), whose sum is σ = 25958232. Its totient is φ = 15382528.

The previous prime is 20429993. The next prime is 20430029. The reversal of 20430005 is 50003402.

It can be written as a sum of positive squares in 4 ways, for example, as 9821956 + 10608049 = 3134^2 + 3257^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20430005 - 2¹⁴ = 20413621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120092 + ... + 120261.

It is an arithmetic number, because the mean of its divisors is an integer number (3244779).

Almost surely, 2^20430005 is an apocalyptic number.

It is an amenable number.

20430005 is a deficient number, since it is larger than the sum of its proper divisors (5528227).

20430005 is a wasteful number, since it uses less digits than its factorization.

20430005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240375.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 20430005 is about 4519.9563050985. The cubic root of 20430005 is about 273.3733392101.

Adding to 20430005 its reverse (50003402), we get a palindrome (70433407).

The spelling of 20430005 in words is "twenty million, four hundred thirty thousand, five".