19990195 has 8 divisors (see below), whose sum is σ = 24762240. Its totient is φ = 15476160.

The previous prime is 19990177. The next prime is 19990213. The reversal of 19990195 is 59109991.

It is an interprime number because it is at equal distance from previous prime (19990177) and next prime (19990213).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19990195 - 2⁵ = 19990163 is a prime.

It is a super-2 number, since 2×19990195² = 799215792276050, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 64330 + ... + 64639.

It is an arithmetic number, because the mean of its divisors is an integer number (3095280).

Almost surely, 2^19990195 is an apocalyptic number.

19990195 is a deficient number, since it is larger than the sum of its proper divisors (4772045).

19990195 is a wasteful number, since it uses less digits than its factorization.

19990195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129005.

The product of its (nonzero) digits is 32805, while the sum is 43.

The square root of 19990195 is about 4471.0395882837. The cubic root of 19990195 is about 271.3973963008.

The spelling of 19990195 in words is "nineteen million, nine hundred ninety thousand, one hundred ninety-five".