19420343 has 4 divisors (see below), whose sum is σ = 20090040. Its totient is φ = 18750648.

The previous prime is 19420321. The next prime is 19420361. The reversal of 19420343 is 34302491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19420343 - 2⁶ = 19420279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19420243) 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, 334805 + ... + 334862.

It is an arithmetic number, because the mean of its divisors is an integer number (5022510).

Almost surely, 2^19420343 is an apocalyptic number.

19420343 is a deficient number, since it is larger than the sum of its proper divisors (669697).

19420343 is an equidigital number, since it uses as much as digits as its factorization.

19420343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669696.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 19420343 is about 4406.8518241484. The cubic root of 19420343 is about 268.7936256564.

The spelling of 19420343 in words is "nineteen million, four hundred twenty thousand, three hundred forty-three".