19402093 has 4 divisors (see below), whose sum is σ = 19465600. Its totient is φ = 19338588.

The previous prime is 19402079. The next prime is 19402121. The reversal of 19402093 is 39020491.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19402093 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 (19402003) 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 3 ways as a sum of consecutive naturals, for example, 31293 + ... + 31906.

It is an arithmetic number, because the mean of its divisors is an integer number (4866400).

Almost surely, 2^19402093 is an apocalyptic number.

It is an amenable number.

19402093 is a deficient number, since it is larger than the sum of its proper divisors (63507).

19402093 is an equidigital number, since it uses as much as digits as its factorization.

19402093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63506.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 19402093 is about 4404.7806982868. The cubic root of 19402093 is about 268.7094008980.

The spelling of 19402093 in words is "nineteen million, four hundred two thousand, ninety-three".