19673470442 has 4 divisors (see below), whose sum is σ = 29510205666. Its totient is φ = 9836735220.

The previous prime is 19673470403. The next prime is 19673470459. The reversal of 19673470442 is 24407437691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18260387161 + 1413083281 = 135131^2 + 37591^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4918367609 + ... + 4918367612.

Almost surely, 2^19673470442 is an apocalyptic number.

19673470442 is a deficient number, since it is larger than the sum of its proper divisors (9836735224).

19673470442 is an equidigital number, since it uses as much as digits as its factorization.

19673470442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9836735223.

The product of its (nonzero) digits is 1016064, while the sum is 47.

The spelling of 19673470442 in words is "nineteen billion, six hundred seventy-three million, four hundred seventy thousand, four hundred forty-two".