19813242 has 8 divisors (see below), whose sum is σ = 39626496. Its totient is φ = 6604412.

The previous prime is 19813237. The next prime is 19813289. The reversal of 19813242 is 24231891.

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

19813242 is an admirable number.

It is a super-3 number, since 3×19813242³ (a number of 23 digits) contains 333 as substring.

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, 1651098 + ... + 1651109.

It is an arithmetic number, because the mean of its divisors is an integer number (4953312).

Almost surely, 2^19813242 is an apocalyptic number.

19813242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19813242 is a wasteful number, since it uses less digits than its factorization.

19813242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3302212.

The product of its digits is 3456, while the sum is 30.

The square root of 19813242 is about 4451.2068026548. The cubic root of 19813242 is about 270.5942193958.

The spelling of 19813242 in words is "nineteen million, eight hundred thirteen thousand, two hundred forty-two".