19964045 has 8 divisors (see below), whose sum is σ = 24012024. Its totient is φ = 15934464.

The previous prime is 19964033. The next prime is 19964059. The reversal of 19964045 is 54046991.

It can be written as a sum of positive squares in 4 ways, for example, as 4012009 + 15952036 = 2003^2 + 3994^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19964045 - 2⁴ = 19964029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2084 + ... + 6653.

It is an arithmetic number, because the mean of its divisors is an integer number (3001503).

Almost surely, 2^19964045 is an apocalyptic number.

It is an amenable number.

19964045 is a deficient number, since it is larger than the sum of its proper divisors (4047979).

19964045 is an equidigital number, since it uses as much as digits as its factorization.

19964045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9199.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 19964045 is about 4468.1142554774. The cubic root of 19964045 is about 271.2790026115.

The spelling of 19964045 in words is "nineteen million, nine hundred sixty-four thousand, forty-five".