19892045 has 12 divisors (see below), whose sum is σ = 24402684. Its totient is φ = 15566400.

The previous prime is 19892021. The next prime is 19892053. The reversal of 19892045 is 54029891.

It can be written as a sum of positive squares in 2 ways, for example, as 4674244 + 15217801 = 2162^2 + 3901^2 .

It is not a de Polignac number, because 19892045 - 2⁶ = 19891981 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 11 ways as a sum of consecutive naturals, for example, 10145 + ... + 11945.

It is an arithmetic number, because the mean of its divisors is an integer number (2033557).

Almost surely, 2^19892045 is an apocalyptic number.

It is an amenable number.

19892045 is a deficient number, since it is larger than the sum of its proper divisors (4510639).

19892045 is an equidigital number, since it uses as much as digits as its factorization.

19892045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900 (or 1853 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 19892045 is about 4460.0498876134. The cubic root of 19892045 is about 270.9524886866.

The spelling of 19892045 in words is "nineteen million, eight hundred ninety-two thousand, forty-five".