19827264739 has 4 divisors (see below), whose sum is σ = 19958571280. Its totient is φ = 19695958200.

The previous prime is 19827264683. The next prime is 19827264761. The reversal of 19827264739 is 93746272891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93746272891 = 1223 ⋅76652717.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19827264739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19827264799) 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 in 3 ways as a sum of consecutive naturals, for example, 65653044 + ... + 65653345.

It is an arithmetic number, because the mean of its divisors is an integer number (4989642820).

Almost surely, 2^19827264739 is an apocalyptic number.

19827264739 is a deficient number, since it is larger than the sum of its proper divisors (131306541).

19827264739 is a wasteful number, since it uses less digits than its factorization.

19827264739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131306540.

The product of its digits is 9144576, while the sum is 58.

The spelling of 19827264739 in words is "nineteen billion, eight hundred twenty-seven million, two hundred sixty-four thousand, seven hundred thirty-nine".