19269945 has 12 divisors (see below), whose sum is σ = 33401316. Its totient is φ = 10277280.

The previous prime is 19269907. The next prime is 19269967. The reversal of 19269945 is 54996291.

It can be written as a sum of positive squares in 2 ways, for example, as 3493161 + 15776784 = 1869^2 + 3972^2 .

It is not a de Polignac number, because 19269945 - 2⁶ = 19269881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 428221 = 19269945 / (1 + 9 + 2 + 6 + 9 + 9 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 19269945.

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, 214066 + ... + 214155.

It is an arithmetic number, because the mean of its divisors is an integer number (2783443).

Almost surely, 2^19269945 is an apocalyptic number.

19269945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19269945 is a deficient number, since it is larger than the sum of its proper divisors (14131371).

19269945 is a wasteful number, since it uses less digits than its factorization.

19269945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428232 (or 428229 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 19269945 is about 4389.7545489469. The cubic root of 19269945 is about 268.0979490860.

The spelling of 19269945 in words is "nineteen million, two hundred sixty-nine thousand, nine hundred forty-five".