20434151539 has 2 divisors, whose sum is σ = 20434151540. Its totient is φ = 20434151538.

The previous prime is 20434151527. The next prime is 20434151609. The reversal of 20434151539 is 93515143402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20434151539 - 2¹⁹ = 20433627251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20434151498 and 20434151507.

It is not a weakly prime, because it can be changed into another prime (20434151519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10217075769 + 10217075770.

It is an arithmetic number, because the mean of its divisors is an integer number (10217075770).

Almost surely, 2^20434151539 is an apocalyptic number.

20434151539 is a deficient number, since it is larger than the sum of its proper divisors (1).

20434151539 is an equidigital number, since it uses as much as digits as its factorization.

20434151539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 20434151539 in words is "twenty billion, four hundred thirty-four million, one hundred fifty-one thousand, five hundred thirty-nine".