19550242 has 4 divisors (see below), whose sum is σ = 29325366. Its totient is φ = 9775120.

The previous prime is 19550239. The next prime is 19550249. The reversal of 19550242 is 24205591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24205591 = 23 ⋅1052417.

It can be written as a sum of positive squares in only one way, i.e., 19280881 + 269361 = 4391^2 + 519^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19550242.

It is not an unprimeable number, because it can be changed into a prime (19550249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4887559 + ... + 4887562.

Almost surely, 2^19550242 is an apocalyptic number.

19550242 is a deficient number, since it is larger than the sum of its proper divisors (9775124).

19550242 is an equidigital number, since it uses as much as digits as its factorization.

19550242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9775123.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 19550242 is about 4421.5655598442. The cubic root of 19550242 is about 269.3915976265.

The spelling of 19550242 in words is "nineteen million, five hundred fifty thousand, two hundred forty-two".