19340345421 has 24 divisors (see below), whose sum is σ = 28304640000. Its totient is φ = 12723620832.

The previous prime is 19340345411. The next prime is 19340345449. The reversal of 19340345421 is 12454304391.

19340345421 is a `hidden beast` number, since 193 + 4 + 0 + 3 + 45 + 421 = 666.

It is not a de Polignac number, because 19340345421 - 2⁵ = 19340345389 is a prime.

It is a super-2 number, since 2×19340345421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19340345411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1585855 + ... + 1598003.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360000).

Almost surely, 2^19340345421 is an apocalyptic number.

It is an amenable number.

19340345421 is a deficient number, since it is larger than the sum of its proper divisors (8964294579).

19340345421 is a wasteful number, since it uses less digits than its factorization.

19340345421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14473 (or 14470 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 19340345421 in words is "nineteen billion, three hundred forty million, three hundred forty-five thousand, four hundred twenty-one".