19999107 has 6 divisors (see below), whose sum is σ = 28887612. Its totient is φ = 13332732.

The previous prime is 19999069. The next prime is 19999117. The reversal of 19999107 is 70199991.

It is not a de Polignac number, because 19999107 - 2¹⁵ = 19966339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19999117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111053 + ... + 1111070.

It is an arithmetic number, because the mean of its divisors is an integer number (4814602).

Almost surely, 2^19999107 is an apocalyptic number.

19999107 is a deficient number, since it is larger than the sum of its proper divisors (8888505).

19999107 is a wasteful number, since it uses less digits than its factorization.

19999107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222129 (or 2222126 counting only the distinct ones).

The product of its (nonzero) digits is 45927, while the sum is 45.

The square root of 19999107 is about 4472.0361134499. The cubic root of 19999107 is about 271.4377216411.

The spelling of 19999107 in words is "nineteen million, nine hundred ninety-nine thousand, one hundred seven".