19976196749 has 8 divisors (see below), whose sum is σ = 21153373560. Its totient is φ = 18799254016.

The previous prime is 19976196719. The next prime is 19976196767. The reversal of 19976196749 is 94769167991.

It can be written as a sum of positive squares in 4 ways, for example, as 14001988900 + 5974207849 = 118330^2 + 77293^2 .

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 19976196749 - 2¹² = 19976192653 is a prime.

It is a super-3 number, since 3×19976196749³ (a number of 32 digits) contains 333 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 (19976196719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135617 + ... + 241545.

It is an arithmetic number, because the mean of its divisors is an integer number (2644171695).

Almost surely, 2^19976196749 is an apocalyptic number.

It is an amenable number.

19976196749 is a deficient number, since it is larger than the sum of its proper divisors (1177176811).

19976196749 is a wasteful number, since it uses less digits than its factorization.

19976196749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117039.

The product of its digits is 46294416, while the sum is 68.

The spelling of 19976196749 in words is "nineteen billion, nine hundred seventy-six million, one hundred ninety-six thousand, seven hundred forty-nine".