19242949 has 4 divisors (see below), whose sum is σ = 20992320. Its totient is φ = 17493580.

The previous prime is 19242947. The next prime is 19242959. The reversal of 19242949 is 94924291.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19242949 - 2¹ = 19242947 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19242943) 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, 874669 + ... + 874690.

It is an arithmetic number, because the mean of its divisors is an integer number (5248080).

Almost surely, 2^19242949 is an apocalyptic number.

It is an amenable number.

19242949 is a deficient number, since it is larger than the sum of its proper divisors (1749371).

19242949 is a wasteful number, since it uses less digits than its factorization.

19242949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749370.

The product of its digits is 46656, while the sum is 40.

The square root of 19242949 is about 4386.6785840770. The cubic root of 19242949 is about 267.9726943666.

The spelling of 19242949 in words is "nineteen million, two hundred forty-two thousand, nine hundred forty-nine".