19736945 has 8 divisors (see below), whose sum is σ = 24188544. Its totient is φ = 15453424.

The previous prime is 19736939. The next prime is 19736989. The reversal of 19736945 is 54963791.

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 19736945 - 2⁴ = 19736929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19736896 and 19736905.

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, 41759 + ... + 42228.

It is an arithmetic number, because the mean of its divisors is an integer number (3023568).

Almost surely, 2^19736945 is an apocalyptic number.

It is an amenable number.

19736945 is a deficient number, since it is larger than the sum of its proper divisors (4451599).

19736945 is an equidigital number, since it uses as much as digits as its factorization.

19736945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84039.

The product of its digits is 204120, while the sum is 44.

The square root of 19736945 is about 4442.6281635987. The cubic root of 19736945 is about 270.2464370952.

The spelling of 19736945 in words is "nineteen million, seven hundred thirty-six thousand, nine hundred forty-five".