19196945 has 8 divisors (see below), whose sum is σ = 23170536. Its totient is φ = 15268096.

The previous prime is 19196929. The next prime is 19196951. The reversal of 19196945 is 54969191.

It can be written as a sum of positive squares in 4 ways, for example, as 10647169 + 8549776 = 3263^2 + 2924^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19196945 - 2⁴ = 19196929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19196896 and 19196905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10232 + ... + 11961.

It is an arithmetic number, because the mean of its divisors is an integer number (2896317).

Almost surely, 2^19196945 is an apocalyptic number.

It is an amenable number.

19196945 is a deficient number, since it is larger than the sum of its proper divisors (3973591).

19196945 is a wasteful number, since it uses less digits than its factorization.

19196945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22371.

The product of its digits is 87480, while the sum is 44.

The square root of 19196945 is about 4381.4318435872. The cubic root of 19196945 is about 267.7589770736.

The spelling of 19196945 in words is "nineteen million, one hundred ninety-six thousand, nine hundred forty-five".