19770663671 has 8 divisors (see below), whose sum is σ = 21569028624. Its totient is φ = 17972470720.

The previous prime is 19770663637. The next prime is 19770663677. The reversal of 19770663671 is 17636607791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19770663671 - 2⁶ = 19770663607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19770663677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369131 + ... + 419283.

It is an arithmetic number, because the mean of its divisors is an integer number (2696128578).

Almost surely, 2^19770663671 is an apocalyptic number.

19770663671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19770663671 is a deficient number, since it is larger than the sum of its proper divisors (1798364953).

19770663671 is a wasteful number, since it uses less digits than its factorization.

19770663671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86001.

The product of its (nonzero) digits is 2000376, while the sum is 53.

The spelling of 19770663671 in words is "nineteen billion, seven hundred seventy million, six hundred sixty-three thousand, six hundred seventy-one".