19450945 has 4 divisors (see below), whose sum is σ = 23341140. Its totient is φ = 15560752.

The previous prime is 19450931. The next prime is 19450957. The reversal of 19450945 is 54905491.

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 6548481 + 12902464 = 2559^2 + 3592^2 .

It is a cyclic number.

It is not a de Polignac number, because 19450945 - 2⁵ = 19450913 is a prime.

It is a super-2 number, since 2×19450945² = 756678522786050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1945090 + ... + 1945099.

It is an arithmetic number, because the mean of its divisors is an integer number (5835285).

Almost surely, 2^19450945 is an apocalyptic number.

It is an amenable number.

19450945 is a deficient number, since it is larger than the sum of its proper divisors (3890195).

19450945 is an equidigital number, since it uses as much as digits as its factorization.

19450945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890194.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 19450945 is about 4410.3225505625. The cubic root of 19450945 is about 268.9347372345.

The spelling of 19450945 in words is "nineteen million, four hundred fifty thousand, nine hundred forty-five".