19908842 has 8 divisors (see below), whose sum is σ = 30369600. Its totient is φ = 9785644.

The previous prime is 19908839. The next prime is 19908857. The reversal of 19908842 is 24880991.

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 19908842.

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, 84242 + ... + 84477.

It is an arithmetic number, because the mean of its divisors is an integer number (3796200).

Almost surely, 2^19908842 is an apocalyptic number.

19908842 is a deficient number, since it is larger than the sum of its proper divisors (10460758).

19908842 is a wasteful number, since it uses less digits than its factorization.

19908842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168780.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 19908842 is about 4461.9325409513. The cubic root of 19908842 is about 271.0287320381.

The spelling of 19908842 in words is "nineteen million, nine hundred eight thousand, eight hundred forty-two".