19315965 has 8 divisors (see below), whose sum is σ = 30905568. Its totient is φ = 10301840.

The previous prime is 19315963. The next prime is 19315973. The reversal of 19315965 is 56951391.

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

It is not a de Polignac number, because 19315965 - 2¹ = 19315963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19315963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 643851 + ... + 643880.

It is an arithmetic number, because the mean of its divisors is an integer number (3863196).

Almost surely, 2^19315965 is an apocalyptic number.

19315965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19315965 is a deficient number, since it is larger than the sum of its proper divisors (11589603).

19315965 is a wasteful number, since it uses less digits than its factorization.

19315965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287739.

The product of its digits is 36450, while the sum is 39.

The square root of 19315965 is about 4394.9931740561. The cubic root of 19315965 is about 268.3112010174.

The spelling of 19315965 in words is "nineteen million, three hundred fifteen thousand, nine hundred sixty-five".