19804434 has 24 divisors (see below), whose sum is σ = 42892272. Its totient is φ = 6093360.

The previous prime is 19804427. The next prime is 19804453. The reversal of 19804434 is 43440891.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19804395 and 19804404.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8752 + ... + 10779.

It is an arithmetic number, because the mean of its divisors is an integer number (1787178).

Almost surely, 2^19804434 is an apocalyptic number.

19804434 is an abundant number, since it is smaller than the sum of its proper divisors (23087838).

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

19804434 is a wasteful number, since it uses less digits than its factorization.

19804434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19562 (or 19549 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 19804434 is about 4450.2172980653. The cubic root of 19804434 is about 270.5541157932.

The spelling of 19804434 in words is "nineteen million, eight hundred four thousand, four hundred thirty-four".