19198223461 has 4 divisors (see below), whose sum is σ = 19817521024. Its totient is φ = 18578925900.

The previous prime is 19198223357. The next prime is 19198223491. The reversal of 19198223461 is 16432289191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16432289191 = 431 ⋅38125961.

It is a cyclic number.

It is not a de Polignac number, because 19198223461 - 2⁹ = 19198222949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19198223491) 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, 309648735 + ... + 309648796.

It is an arithmetic number, because the mean of its divisors is an integer number (4954380256).

Almost surely, 2^19198223461 is an apocalyptic number.

It is an amenable number.

19198223461 is a deficient number, since it is larger than the sum of its proper divisors (619297563).

19198223461 is an equidigital number, since it uses as much as digits as its factorization.

19198223461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619297562.

The product of its digits is 186624, while the sum is 46.

The spelling of 19198223461 in words is "nineteen billion, one hundred ninety-eight million, two hundred twenty-three thousand, four hundred sixty-one".