19659145 has 16 divisors (see below), whose sum is σ = 25997760. Its totient is φ = 14152000.

The previous prime is 19659139. The next prime is 19659163. The reversal of 19659145 is 54195691.

It is not a de Polignac number, because 19659145 - 2³ = 19659137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19659098 and 19659107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3786 + ... + 7324.

It is an arithmetic number, because the mean of its divisors is an integer number (1624860).

Almost surely, 2^19659145 is an apocalyptic number.

It is an amenable number.

19659145 is a deficient number, since it is larger than the sum of its proper divisors (6338615).

19659145 is a wasteful number, since it uses less digits than its factorization.

19659145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3656.

The product of its digits is 48600, while the sum is 40.

The square root of 19659145 is about 4433.8634394848. The cubic root of 19659145 is about 269.8908795446.

The spelling of 19659145 in words is "nineteen million, six hundred fifty-nine thousand, one hundred forty-five".