19879970546 has 8 divisors (see below), whose sum is σ = 29947939164. Its totient is φ = 9897324160.

The previous prime is 19879970543. The next prime is 19879970549. The reversal of 19879970546 is 64507997891.

It is an interprime number because it is at equal distance from previous prime (19879970543) and next prime (19879970549).

It can be written as a sum of positive squares in 2 ways, for example, as 19517487025 + 362483521 = 139705^2 + 19039^2 .

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

It is not an unprimeable number, because it can be changed into a prime (19879970543) 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, 21329975 + ... + 21330906.

Almost surely, 2^19879970546 is an apocalyptic number.

19879970546 is a deficient number, since it is larger than the sum of its proper divisors (10067968618).

19879970546 is a wasteful number, since it uses less digits than its factorization.

19879970546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42661116.

The product of its (nonzero) digits is 34292160, while the sum is 65.

The spelling of 19879970546 in words is "nineteen billion, eight hundred seventy-nine million, nine hundred seventy thousand, five hundred forty-six".