19452716978 has 8 divisors (see below), whose sum is σ = 29479890972. Its totient is φ = 9626086656.

The previous prime is 19452716929. The next prime is 19452716999. The reversal of 19452716978 is 87961725491.

It can be written as a sum of positive squares in 2 ways, for example, as 18923578969 + 529138009 = 137563^2 + 23003^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 50135675 + ... + 50136062.

Almost surely, 2^19452716978 is an apocalyptic number.

19452716978 is a deficient number, since it is larger than the sum of its proper divisors (10027173994).

19452716978 is a wasteful number, since it uses less digits than its factorization.

19452716978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100271836.

The product of its digits is 7620480, while the sum is 59.

The spelling of 19452716978 in words is "nineteen billion, four hundred fifty-two million, seven hundred sixteen thousand, nine hundred seventy-eight".