20430001 has 4 divisors (see below), whose sum is σ = 20442100. Its totient is φ = 20417904.

The previous prime is 20429993. The next prime is 20430029. The reversal of 20430001 is 10003402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10003402 = 2 ⋅5001701.

It can be written as a sum of positive squares in 2 ways, for example, as 14554225 + 5875776 = 3815^2 + 2424^2 .

It is a cyclic number.

It is not a de Polignac number, because 20430001 - 2³ = 20429993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20430001.

It is not an unprimeable number, because it can be changed into a prime (20430041) 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, 3006 + ... + 7063.

It is an arithmetic number, because the mean of its divisors is an integer number (5110525).

Almost surely, 2^20430001 is an apocalyptic number.

It is an amenable number.

20430001 is a deficient number, since it is larger than the sum of its proper divisors (12099).

20430001 is a wasteful number, since it uses less digits than its factorization.

20430001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12098.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20430001 is about 4519.9558626164. The cubic root of 20430001 is about 273.3733213688.

Adding to 20430001 its reverse (10003402), we get a palindrome (30433403).

The spelling of 20430001 in words is "twenty million, four hundred thirty thousand, one".