19380047 has 4 divisors (see below), whose sum is σ = 19390200. Its totient is φ = 19369896.

The previous prime is 19380037. The next prime is 19380059. The reversal of 19380047 is 74008391.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 19380047 - 2¹⁶ = 19314511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19379995 and 19380022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19380037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253 + ... + 6350.

It is an arithmetic number, because the mean of its divisors is an integer number (4847550).

Almost surely, 2^19380047 is an apocalyptic number.

19380047 is a deficient number, since it is larger than the sum of its proper divisors (10153).

19380047 is an equidigital number, since it uses as much as digits as its factorization.

19380047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10152.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 19380047 is about 4402.2774787603. The cubic root of 19380047 is about 268.6075869234.

The spelling of 19380047 in words is "nineteen million, three hundred eighty thousand, forty-seven".