19321893 has 12 divisors (see below), whose sum is σ = 27975948. Its totient is φ = 12850560.

The previous prime is 19321889. The next prime is 19321901. The reversal of 19321893 is 39812391.

It can be written as a sum of positive squares in 2 ways, for example, as 4088484 + 15233409 = 2022^2 + 3903^2 .

It is not a de Polignac number, because 19321893 - 2² = 19321889 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19321823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1821 + ... + 6477.

It is an arithmetic number, because the mean of its divisors is an integer number (2331329).

Almost surely, 2^19321893 is an apocalyptic number.

It is an amenable number.

19321893 is a deficient number, since it is larger than the sum of its proper divisors (8654055).

19321893 is a wasteful number, since it uses less digits than its factorization.

19321893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5124 (or 5121 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 19321893 is about 4395.6675260989. The cubic root of 19321893 is about 268.3386461233.

The spelling of 19321893 in words is "nineteen million, three hundred twenty-one thousand, eight hundred ninety-three".