19396865 has 8 divisors (see below), whose sum is σ = 23405928. Its totient is φ = 15431040.

The previous prime is 19396849. The next prime is 19396873. The reversal of 19396865 is 56869391.

It can be written as a sum of positive squares in 4 ways, for example, as 1385329 + 18011536 = 1177^2 + 4244^2 .

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

It is not a de Polignac number, because 19396865 - 2⁴ = 19396849 is a prime.

It is a Duffinian number.

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, 9812 + ... + 11621.

It is an arithmetic number, because the mean of its divisors is an integer number (2925741).

Almost surely, 2^19396865 is an apocalyptic number.

It is an amenable number.

19396865 is a deficient number, since it is larger than the sum of its proper divisors (4009063).

19396865 is a wasteful number, since it uses less digits than its factorization.

19396865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21619.

The product of its digits is 349920, while the sum is 47.

The square root of 19396865 is about 4404.1872121880. The cubic root of 19396865 is about 268.6852636576.

The spelling of 19396865 in words is "nineteen million, three hundred ninety-six thousand, eight hundred sixty-five".