19424823146 has 4 divisors (see below), whose sum is σ = 29137234722. Its totient is φ = 9712411572.

The previous prime is 19424823127. The next prime is 19424823151. The reversal of 19424823146 is 64132842491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64132842491 = 389 ⋅164865919.

It can be written as a sum of positive squares in only one way, i.e., 11233668121 + 8191155025 = 105989^2 + 90505^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19424823097 and 19424823106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4856205785 + ... + 4856205788.

Almost surely, 2^19424823146 is an apocalyptic number.

19424823146 is a deficient number, since it is larger than the sum of its proper divisors (9712411576).

19424823146 is an equidigital number, since it uses as much as digits as its factorization.

19424823146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9712411575.

The product of its digits is 331776, while the sum is 44.

The spelling of 19424823146 in words is "nineteen billion, four hundred twenty-four million, eight hundred twenty-three thousand, one hundred forty-six".