19941893 has 4 divisors (see below), whose sum is σ = 19963008. Its totient is φ = 19920780.

The previous prime is 19941881. The next prime is 19941899. The reversal of 19941893 is 39814991.

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: 39814991 = 1103 ⋅36097.

It is a cyclic number.

It is not a de Polignac number, because 19941893 - 2²⁰ = 18893317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19941899) 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, 9071 + ... + 11052.

It is an arithmetic number, because the mean of its divisors is an integer number (4990752).

Almost surely, 2^19941893 is an apocalyptic number.

It is an amenable number.

19941893 is a deficient number, since it is larger than the sum of its proper divisors (21115).

19941893 is an equidigital number, since it uses as much as digits as its factorization.

19941893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21114.

The product of its digits is 69984, while the sum is 44.

The square root of 19941893 is about 4465.6346693387. The cubic root of 19941893 is about 271.1786288897.

The spelling of 19941893 in words is "nineteen million, nine hundred forty-one thousand, eight hundred ninety-three".