19420168448 has 18 divisors (see below), whose sum is σ = 38764477374. Its totient is φ = 9710084096.

The previous prime is 19420168403. The next prime is 19420168459. The reversal of 19420168448 is 84486102491.

It can be written as a sum of positive squares in only one way, i.e., 18810671104 + 609497344 = 137152^2 + 24688^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37929761 + ... + 37930272.

Almost surely, 2^19420168448 is an apocalyptic number.

It is an amenable number.

19420168448 is a deficient number, since it is larger than the sum of its proper divisors (19344308926).

19420168448 is an frugal number, since it uses more digits than its factorization.

19420168448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75860049 (or 75860035 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 19420168448 in words is "nineteen billion, four hundred twenty million, one hundred sixty-eight thousand, four hundred forty-eight".