19241798461 has 4 divisors (see below), whose sum is σ = 19275615900. Its totient is φ = 19207981024.

The previous prime is 19241798447. The next prime is 19241798467. The reversal of 19241798461 is 16489714291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16489714291 = 241 ⋅68422051.

It can be written as a sum of positive squares in 2 ways, for example, as 11032351225 + 8209447236 = 105035^2 + 90606^2 .

It is a cyclic number.

It is not a de Polignac number, because 19241798461 - 2⁷ = 19241798333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19241798399 and 19241798408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19241798467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16907866 + ... + 16909003.

It is an arithmetic number, because the mean of its divisors is an integer number (4818903975).

Almost surely, 2^19241798461 is an apocalyptic number.

It is an amenable number.

19241798461 is a deficient number, since it is larger than the sum of its proper divisors (33817439).

19241798461 is an equidigital number, since it uses as much as digits as its factorization.

19241798461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33817438.

The product of its digits is 870912, while the sum is 52.

The spelling of 19241798461 in words is "nineteen billion, two hundred forty-one million, seven hundred ninety-eight thousand, four hundred sixty-one".