20381594539 has 2 divisors, whose sum is σ = 20381594540. Its totient is φ = 20381594538.

The previous prime is 20381594489. The next prime is 20381594551. The reversal of 20381594539 is 93549518302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20381594539 - 2¹⁷ = 20381463467 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20381594492 and 20381594501.

It is not a weakly prime, because it can be changed into another prime (20381594839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10190797269 + 10190797270.

It is an arithmetic number, because the mean of its divisors is an integer number (10190797270).

Almost surely, 2^20381594539 is an apocalyptic number.

20381594539 is a deficient number, since it is larger than the sum of its proper divisors (1).

20381594539 is an equidigital number, since it uses as much as digits as its factorization.

20381594539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 20381594539 in words is "twenty billion, three hundred eighty-one million, five hundred ninety-four thousand, five hundred thirty-nine".