19545242 has 8 divisors (see below), whose sum is σ = 29532276. Its totient is φ = 9701152.

The previous prime is 19545203. The next prime is 19545247. The reversal of 19545242 is 24254591.

It is a Cunningham number, because it is equal to 4421²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 19545241 + 1 = 4421^2 + 1^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 19545199 and 19545208.

It is not an unprimeable number, because it can be changed into a prime (19545247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35393 + ... + 35940.

Almost surely, 2^19545242 is an apocalyptic number.

19545242 is a deficient number, since it is larger than the sum of its proper divisors (9987034).

19545242 is a wasteful number, since it uses less digits than its factorization.

19545242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71472.

The product of its digits is 14400, while the sum is 32.

The square root of 19545242 is about 4421.0001130966. Note that the first 3 decimals coincide. The cubic root of 19545242 is about 269.3686299170.

The spelling of 19545242 in words is "nineteen million, five hundred forty-five thousand, two hundred forty-two".