19800343 has 4 divisors (see below), whose sum is σ = 19996488. Its totient is φ = 19604200.

The previous prime is 19800331. The next prime is 19800349. The reversal of 19800343 is 34300891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34300891 = 139 ⋅246769.

It is a cyclic number.

It is not a de Polignac number, because 19800343 - 2⁵ = 19800311 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 (19800349) 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 3 ways as a sum of consecutive naturals, for example, 97921 + ... + 98122.

It is an arithmetic number, because the mean of its divisors is an integer number (4999122).

Almost surely, 2^19800343 is an apocalyptic number.

19800343 is a deficient number, since it is larger than the sum of its proper divisors (196145).

19800343 is a wasteful number, since it uses less digits than its factorization.

19800343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196144.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 19800343 is about 4449.7576338493. The cubic root of 19800343 is about 270.5354850645.

It can be divided in two parts, 1 and 9800343, that added together give a cube (9800344 = 214³).

The spelling of 19800343 in words is "nineteen million, eight hundred thousand, three hundred forty-three".