19920842 has 8 divisors (see below), whose sum is σ = 30327456. Its totient is φ = 9811692.

The previous prime is 19920833. The next prime is 19920847. The reversal of 19920842 is 24802991.

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

It is not an unprimeable number, because it can be changed into a prime (19920847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74198 + ... + 74465.

It is an arithmetic number, because the mean of its divisors is an integer number (3790932).

Almost surely, 2^19920842 is an apocalyptic number.

19920842 is a deficient number, since it is larger than the sum of its proper divisors (10406614).

19920842 is a wasteful number, since it uses less digits than its factorization.

19920842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148732.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 19920842 is about 4463.2770471930. The cubic root of 19920842 is about 271.0831750431.

The spelling of 19920842 in words is "nineteen million, nine hundred twenty thousand, eight hundred forty-two".