19801342 has 8 divisors (see below), whose sum is σ = 32402232. Its totient is φ = 9000600.

The previous prime is 19801339. The next prime is 19801351. The reversal of 19801342 is 24310891.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 19801342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450009 + ... + 450052.

It is an arithmetic number, because the mean of its divisors is an integer number (4050279).

Almost surely, 2^19801342 is an apocalyptic number.

19801342 is a deficient number, since it is larger than the sum of its proper divisors (12600890).

19801342 is a wasteful number, since it uses less digits than its factorization.

19801342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900074.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 19801342 is about 4449.8698857382. The cubic root of 19801342 is about 270.5400348241.

The spelling of 19801342 in words is "nineteen million, eight hundred one thousand, three hundred forty-two".