20340431401 has 2 divisors, whose sum is σ = 20340431402. Its totient is φ = 20340431400.

The previous prime is 20340431387. The next prime is 20340431411. The reversal of 20340431401 is 10413404302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18770370025 + 1570061376 = 137005^2 + 39624^2 .

It is a cyclic number.

It is not a de Polignac number, because 20340431401 - 2⁵ = 20340431369 is a prime.

It is not a weakly prime, because it can be changed into another prime (20340431411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10170215700 + 10170215701.

It is an arithmetic number, because the mean of its divisors is an integer number (10170215701).

Almost surely, 2^20340431401 is an apocalyptic number.

It is an amenable number.

20340431401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20340431401 is an equidigital number, since it uses as much as digits as its factorization.

20340431401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20340431401 its reverse (10413404302), we get a palindrome (30753835703).

The spelling of 20340431401 in words is "twenty billion, three hundred forty million, four hundred thirty-one thousand, four hundred one".