19136993 has 4 divisors (see below), whose sum is σ = 19213488. Its totient is φ = 19060500.

The previous prime is 19136963. The next prime is 19137007. The reversal of 19136993 is 39963191.

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.

It is a cyclic number.

It is not a de Polignac number, because 19136993 - 2¹⁶ = 19071457 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 19136993.

It is not an unprimeable number, because it can be changed into a prime (19136903) 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, 37871 + ... + 38372.

It is an arithmetic number, because the mean of its divisors is an integer number (4803372).

Almost surely, 2^19136993 is an apocalyptic number.

It is an amenable number.

19136993 is a deficient number, since it is larger than the sum of its proper divisors (76495).

19136993 is an equidigital number, since it uses as much as digits as its factorization.

19136993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76494.

The product of its digits is 39366, while the sum is 41.

The square root of 19136993 is about 4374.5848945929. The cubic root of 19136993 is about 267.4799495846.

The spelling of 19136993 in words is "nineteen million, one hundred thirty-six thousand, nine hundred ninety-three".