19945107 has 60 divisors (see below), whose sum is σ = 36704304. Its totient is φ = 10372320.

The previous prime is 19945091. The next prime is 19945111. The reversal of 19945107 is 70154991.

It is not a de Polignac number, because 19945107 - 2⁴ = 19945091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19945187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 280882 + ... + 280952.

Almost surely, 2^19945107 is an apocalyptic number.

19945107 is a deficient number, since it is larger than the sum of its proper divisors (16759197).

19945107 is an equidigital number, since it uses as much as digits as its factorization.

19945107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 19945107 is about 4465.9945141032. The cubic root of 19945107 is about 271.1931965688.

The spelling of 19945107 in words is "nineteen million, nine hundred forty-five thousand, one hundred seven".