19747580039 has 4 divisors (see below), whose sum is σ = 21542814600. Its totient is φ = 17952345480.

The previous prime is 19747580011. The next prime is 19747580059. The reversal of 19747580039 is 93008574791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19747580039 - 2¹⁶ = 19747514503 is a prime.

It is a super-2 number, since 2×19747580039² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19747580059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 897617264 + ... + 897617285.

It is an arithmetic number, because the mean of its divisors is an integer number (5385703650).

Almost surely, 2^19747580039 is an apocalyptic number.

19747580039 is a deficient number, since it is larger than the sum of its proper divisors (1795234561).

19747580039 is a wasteful number, since it uses less digits than its factorization.

19747580039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795234560.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 19747580039 in words is "nineteen billion, seven hundred forty-seven million, five hundred eighty thousand, thirty-nine".