19343990 has 8 divisors (see below), whose sum is σ = 34819200. Its totient is φ = 7737592.

The previous prime is 19343983. The next prime is 19344029. The reversal of 19343990 is 9934391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 967190 + ... + 967209.

It is an arithmetic number, because the mean of its divisors is an integer number (4352400).

Almost surely, 2^19343990 is an apocalyptic number.

19343990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19343990 is a deficient number, since it is larger than the sum of its proper divisors (15475210).

19343990 is a wasteful number, since it uses less digits than its factorization.

19343990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934406.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 19343990 is about 4398.1803055355. The cubic root of 19343990 is about 268.4409000818.

The spelling of 19343990 in words is "nineteen million, three hundred forty-three thousand, nine hundred ninety".