19677764471039 has 4 divisors (see below), whose sum is σ = 19678000332120. Its totient is φ = 19677528609960.

The previous prime is 19677764471017. The next prime is 19677764471051. The reversal of 19677764471039 is 93017446777691.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19677764471039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19677764476039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117805352 + ... + 117972269.

It is an arithmetic number, because the mean of its divisors is an integer number (4919500083030).

Almost surely, 2^{19677764471039} is an apocalyptic number.

19677764471039 is a deficient number, since it is larger than the sum of its proper divisors (235861081).

19677764471039 is an equidigital number, since it uses as much as digits as its factorization.

19677764471039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235861080.

The product of its (nonzero) digits is 336063168, while the sum is 71.

The spelling of 19677764471039 in words is "nineteen trillion, six hundred seventy-seven billion, seven hundred sixty-four million, four hundred seventy-one thousand, thirty-nine".