20340401 has 2 divisors, whose sum is σ = 20340402. Its totient is φ = 20340400.

The previous prime is 20340391. The next prime is 20340403. The reversal of 20340401 is 10404302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18447025 + 1893376 = 4295^2 + 1376^2 .

It is a cyclic number.

It is not a de Polignac number, because 20340401 - 2¹⁰ = 20339377 is a prime.

Together with 20340403, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (20340403) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10170200 + 10170201.

It is an arithmetic number, because the mean of its divisors is an integer number (10170201).

Almost surely, 2^20340401 is an apocalyptic number.

It is an amenable number.

20340401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20340401 is an equidigital number, since it uses as much as digits as its factorization.

20340401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20340401 is about 4510.0333701648. The cubic root of 20340401 is about 272.9730905955.

Adding to 20340401 its reverse (10404302), we get a palindrome (30744703).

It can be divided in two parts, 203 and 40401, that added together give a palindrome (40604).

The spelling of 20340401 in words is "twenty million, three hundred forty thousand, four hundred one".