19723490070779 has 4 divisors (see below), whose sum is σ = 21516534622680. Its totient is φ = 17930445518880.

The previous prime is 19723490070737. The next prime is 19723490070793. The reversal of 19723490070779 is 97707009432791.

It is a happy number.

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 19723490070779 - 2²⁰ = 19723489022203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19723490000779) 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, 896522275934 + ... + 896522275955.

It is an arithmetic number, because the mean of its divisors is an integer number (5379133655670).

Almost surely, 2^{19723490070779} is an apocalyptic number.

19723490070779 is a deficient number, since it is larger than the sum of its proper divisors (1793044551901).

19723490070779 is a wasteful number, since it uses less digits than its factorization.

19723490070779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793044551900.

The product of its (nonzero) digits is 42007896, while the sum is 65.

The spelling of 19723490070779 in words is "nineteen trillion, seven hundred twenty-three billion, four hundred ninety million, seventy thousand, seven hundred seventy-nine".