19996105 has 16 divisors (see below), whose sum is σ = 24868944. Its totient is φ = 15425280.

The previous prime is 19996099. The next prime is 19996121. The reversal of 19996105 is 50169991.

It can be written as a sum of positive squares in 8 ways, for example, as 309136 + 19686969 = 556^2 + 4437^2 .

It is not a de Polignac number, because 19996105 - 2⁵ = 19996073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15547 + ... + 16783.

It is an arithmetic number, because the mean of its divisors is an integer number (1554309).

Almost surely, 2^19996105 is an apocalyptic number.

It is an amenable number.

19996105 is a deficient number, since it is larger than the sum of its proper divisors (4872839).

19996105 is a wasteful number, since it uses less digits than its factorization.

19996105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356.

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 19996105 is about 4471.7004595567. The cubic root of 19996105 is about 271.4241394211.

The spelling of 19996105 in words is "nineteen million, nine hundred ninety-six thousand, one hundred five".