19804242 has 16 divisors (see below), whose sum is σ = 41330880. Its totient is φ = 6314352.

The previous prime is 19804237. The next prime is 19804247. The reversal of 19804242 is 24240891.

It is an interprime number because it is at equal distance from previous prime (19804237) and next prime (19804247).

It is not an unprimeable number, because it can be changed into a prime (19804247) 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, 71617 + ... + 71892.

It is an arithmetic number, because the mean of its divisors is an integer number (2583180).

Almost surely, 2^19804242 is an apocalyptic number.

19804242 is an abundant number, since it is smaller than the sum of its proper divisors (21526638).

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

19804242 is a wasteful number, since it uses less digits than its factorization.

19804242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143537.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 19804242 is about 4450.1957260327. The cubic root of 19804242 is about 270.5532414678.

The spelling of 19804242 in words is "nineteen million, eight hundred four thousand, two hundred forty-two".