19804061 has 16 divisors (see below), whose sum is σ = 21672960. Its totient is φ = 18033840.

The previous prime is 19804027. The next prime is 19804063. The reversal of 19804061 is 16040891.

It is a cyclic number.

It is not a de Polignac number, because 19804061 - 2¹⁰ = 19803037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19804063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59666 + ... + 59996.

It is an arithmetic number, because the mean of its divisors is an integer number (1354560).

Almost surely, 2^19804061 is an apocalyptic number.

It is an amenable number.

19804061 is a deficient number, since it is larger than the sum of its proper divisors (1868899).

19804061 is a wasteful number, since it uses less digits than its factorization.

19804061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 19804061 is about 4450.1753898021. The cubic root of 19804061 is about 270.5524172288.

The spelling of 19804061 in words is "nineteen million, eight hundred four thousand, sixty-one".