19184969421 has 32 divisors (see below), whose sum is σ = 30268149120. Its totient is φ = 11967996672.

The previous prime is 19184969413. The next prime is 19184969429. The reversal of 19184969421 is 12496948191.

It is an interprime number because it is at equal distance from previous prime (19184969413) and next prime (19184969429).

It is not a de Polignac number, because 19184969421 - 2³ = 19184969413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19184969429) 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 31 ways as a sum of consecutive naturals, for example, 41395 + ... + 200208.

It is an arithmetic number, because the mean of its divisors is an integer number (945879660).

Almost surely, 2^19184969421 is an apocalyptic number.

It is an amenable number.

19184969421 is a deficient number, since it is larger than the sum of its proper divisors (11083179699).

19184969421 is a wasteful number, since it uses less digits than its factorization.

19184969421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241802 (or 241796 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The spelling of 19184969421 in words is "nineteen billion, one hundred eighty-four million, nine hundred sixty-nine thousand, four hundred twenty-one".