19945607 has 8 divisors (see below), whose sum is σ = 23038992. Its totient is φ = 17065600.

The previous prime is 19945589. The next prime is 19945609. The reversal of 19945607 is 70654991.

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 19945607 - 2⁸ = 19945351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19945609) 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, 53144 + ... + 53517.

It is an arithmetic number, because the mean of its divisors is an integer number (2879874).

Almost surely, 2^19945607 is an apocalyptic number.

19945607 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

19945607 is a deficient number, since it is larger than the sum of its proper divisors (3093385).

19945607 is a wasteful number, since it uses less digits than its factorization.

19945607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106689.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 19945607 is about 4466.0504923254. The cubic root of 19945607 is about 271.1954627130.

The spelling of 19945607 in words is "nineteen million, nine hundred forty-five thousand, six hundred seven".