19950005 has 4 divisors (see below), whose sum is σ = 23940012. Its totient is φ = 15960000.

The previous prime is 19949977. The next prime is 19950013. The reversal of 19950005 is 50005991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10817521 + 9132484 = 3289^2 + 3022^2 .

It is not a de Polignac number, because 19950005 - 2⁸ = 19949749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19950005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1994996 + ... + 1995005.

It is an arithmetic number, because the mean of its divisors is an integer number (5985003).

Almost surely, 2^19950005 is an apocalyptic number.

It is an amenable number.

19950005 is a deficient number, since it is larger than the sum of its proper divisors (3990007).

19950005 is an equidigital number, since it uses as much as digits as its factorization.

19950005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3990006.

The product of its (nonzero) digits is 2025, while the sum is 29.

The square root of 19950005 is about 4466.5428465425. The cubic root of 19950005 is about 271.2153940859.

Adding to 19950005 its reverse (50005991), we get a palindrome (69955996).

The spelling of 19950005 in words is "nineteen million, nine hundred fifty thousand, five".