19467841421 has 4 divisors (see below), whose sum is σ = 22248961632. Its totient is φ = 16686721212.

The previous prime is 19467841417. The next prime is 19467841423. The reversal of 19467841421 is 12414876491.

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.

It is not a de Polignac number, because 19467841421 - 2² = 19467841417 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 (19467841423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390560095 + ... + 1390560108.

It is an arithmetic number, because the mean of its divisors is an integer number (5562240408).

Almost surely, 2^19467841421 is an apocalyptic number.

It is an amenable number.

19467841421 is a deficient number, since it is larger than the sum of its proper divisors (2781120211).

19467841421 is an equidigital number, since it uses as much as digits as its factorization.

19467841421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781120210.

The product of its digits is 387072, while the sum is 47.

The spelling of 19467841421 in words is "nineteen billion, four hundred sixty-seven million, eight hundred forty-one thousand, four hundred twenty-one".