19242805 has 8 divisors (see below), whose sum is σ = 23887800. Its totient is φ = 14863296.

The previous prime is 19242799. The next prime is 19242809. The reversal of 19242805 is 50824291.

It can be written as a sum of positive squares in 4 ways, for example, as 4056196 + 15186609 = 2014^2 + 3897^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 19242805 - 2²³ = 10854197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19242809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66210 + ... + 66499.

It is an arithmetic number, because the mean of its divisors is an integer number (2985975).

Almost surely, 2^19242805 is an apocalyptic number.

It is an amenable number.

19242805 is a deficient number, since it is larger than the sum of its proper divisors (4644995).

19242805 is a wasteful number, since it uses less digits than its factorization.

19242805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132743.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 19242805 is about 4386.6621707170. The cubic root of 19242805 is about 267.9720259284.

The spelling of 19242805 in words is "nineteen million, two hundred forty-two thousand, eight hundred five".