19428405922 has 4 divisors (see below), whose sum is σ = 29142608886. Its totient is φ = 9714202960.

The previous prime is 19428405917. The next prime is 19428405929. The reversal of 19428405922 is 22950482491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22950482491 = 12227 ⋅1877033.

It can be written as a sum of positive squares in only one way, i.e., 13600457641 + 5827948281 = 116621^2 + 76341^2 .

It is not an unprimeable number, because it can be changed into a prime (19428405929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4857101479 + ... + 4857101482.

Almost surely, 2^19428405922 is an apocalyptic number.

19428405922 is a deficient number, since it is larger than the sum of its proper divisors (9714202964).

19428405922 is an equidigital number, since it uses as much as digits as its factorization.

19428405922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9714202963.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 19428405922 in words is "nineteen billion, four hundred twenty-eight million, four hundred five thousand, nine hundred twenty-two".