19930045 has 4 divisors (see below), whose sum is σ = 23916060. Its totient is φ = 15944032.

The previous prime is 19930033. The next prime is 19930061. The reversal of 19930045 is 54003991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3136441 + 16793604 = 1771^2 + 4098^2 .

It is a cyclic number.

It is not a de Polignac number, because 19930045 - 2¹¹ = 19927997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19929989 and 19930016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1993000 + ... + 1993009.

It is an arithmetic number, because the mean of its divisors is an integer number (5979015).

Almost surely, 2^19930045 is an apocalyptic number.

It is an amenable number.

19930045 is a deficient number, since it is larger than the sum of its proper divisors (3986015).

19930045 is an equidigital number, since it uses as much as digits as its factorization.

19930045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3986014.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 19930045 is about 4464.3078970877. The cubic root of 19930045 is about 271.1249134793.

The spelling of 19930045 in words is "nineteen million, nine hundred thirty thousand, forty-five".