19380993 has 4 divisors (see below), whose sum is σ = 25841328. Its totient is φ = 12920660.

The previous prime is 19380971. The next prime is 19381009. The reversal of 19380993 is 39908391.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39908391 = 3 ⋅13302797.

It is a cyclic number.

It is not a de Polignac number, because 19380993 - 2¹⁷ = 19249921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19380943) 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, 3230163 + ... + 3230168.

It is an arithmetic number, because the mean of its divisors is an integer number (6460332).

Almost surely, 2^19380993 is an apocalyptic number.

It is an amenable number.

19380993 is a deficient number, since it is larger than the sum of its proper divisors (6460335).

19380993 is an equidigital number, since it uses as much as digits as its factorization.

19380993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6460334.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 19380993 is about 4402.3849218350. The cubic root of 19380993 is about 268.6119573745.

The spelling of 19380993 in words is "nineteen million, three hundred eighty thousand, nine hundred ninety-three".