19768545 has 48 divisors (see below), whose sum is σ = 36421632. Its totient is φ = 9901440.

The previous prime is 19768513. The next prime is 19768549. The reversal of 19768545 is 54586791.

It is not a de Polignac number, because 19768545 - 2⁵ = 19768513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 19768545.

It is not an unprimeable number, because it can be changed into a prime (19768549) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51424 + ... + 51806.

It is an arithmetic number, because the mean of its divisors is an integer number (758784).

Almost surely, 2^19768545 is an apocalyptic number.

19768545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19768545 is a deficient number, since it is larger than the sum of its proper divisors (16653087).

19768545 is a wasteful number, since it uses less digits than its factorization.

19768545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 459 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 19768545 is about 4446.1831946064. The cubic root of 19768545 is about 270.3905869606.

The spelling of 19768545 in words is "nineteen million, seven hundred sixty-eight thousand, five hundred forty-five".