19383661 has 8 divisors (see below), whose sum is σ = 21224448. Its totient is φ = 17556000.

The previous prime is 19383653. The next prime is 19383701. The reversal of 19383661 is 16638391.

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

It is not a de Polignac number, because 19383661 - 2³ = 19383653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19383661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19383601) 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, 45 + ... + 6226.

It is an arithmetic number, because the mean of its divisors is an integer number (2653056).

Almost surely, 2^19383661 is an apocalyptic number.

19383661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19383661 is a deficient number, since it is larger than the sum of its proper divisors (1840787).

19383661 is a wasteful number, since it uses less digits than its factorization.

19383661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6563.

The product of its digits is 23328, while the sum is 37.

The square root of 19383661 is about 4402.6879289816. The cubic root of 19383661 is about 268.6242825741.

The spelling of 19383661 in words is "nineteen million, three hundred eighty-three thousand, six hundred sixty-one".