20340431429 has 2 divisors, whose sum is σ = 20340431430. Its totient is φ = 20340431428.

The previous prime is 20340431411. The next prime is 20340431459. The reversal of 20340431429 is 92413404302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12114304225 + 8226127204 = 110065^2 + 90698^2 .

It is a cyclic number.

It is not a de Polignac number, because 20340431429 - 2⁸ = 20340431173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20340431395 and 20340431404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20340431459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10170215714 + 10170215715.

It is an arithmetic number, because the mean of its divisors is an integer number (10170215715).

Almost surely, 2^20340431429 is an apocalyptic number.

It is an amenable number.

20340431429 is a deficient number, since it is larger than the sum of its proper divisors (1).

20340431429 is an equidigital number, since it uses as much as digits as its factorization.

20340431429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 20340431429 in words is "twenty billion, three hundred forty million, four hundred thirty-one thousand, four hundred twenty-nine".