19404361 has 8 divisors (see below), whose sum is σ = 20584584. Its totient is φ = 18228480.

The previous prime is 19404353. The next prime is 19404367. The reversal of 19404361 is 16340491.

It can be written as a sum of positive squares in 4 ways, for example, as 1806336 + 17598025 = 1344^2 + 4195^2 .

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 19404361 - 2³ = 19404353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19404367) 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, 15391 + ... + 16603.

It is an arithmetic number, because the mean of its divisors is an integer number (2573073).

Almost surely, 2^19404361 is an apocalyptic number.

It is an amenable number.

19404361 is a deficient number, since it is larger than the sum of its proper divisors (1180223).

19404361 is a wasteful number, since it uses less digits than its factorization.

19404361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 19404361 is about 4405.0381383139. The cubic root of 19404361 is about 268.7198707165.

The spelling of 19404361 in words is "nineteen million, four hundred four thousand, three hundred sixty-one".