19794142 has 4 divisors (see below), whose sum is σ = 29691216. Its totient is φ = 9897070.

The previous prime is 19794139. The next prime is 19794163. The reversal of 19794142 is 24149791.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948534 + ... + 4948537.

It is an arithmetic number, because the mean of its divisors is an integer number (7422804).

Almost surely, 2^19794142 is an apocalyptic number.

19794142 is a deficient number, since it is larger than the sum of its proper divisors (9897074).

19794142 is an equidigital number, since it uses as much as digits as its factorization.

19794142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9897073.

The product of its digits is 18144, while the sum is 37.

The square root of 19794142 is about 4449.0607997644. The cubic root of 19794142 is about 270.5072403400.

The spelling of 19794142 in words is "nineteen million, seven hundred ninety-four thousand, one hundred forty-two".