19940195 has 24 divisors (see below), whose sum is σ = 27463968. Its totient is φ = 13861760.

The previous prime is 19940191. The next prime is 19940237. The reversal of 19940195 is 59104991.

It is not a de Polignac number, because 19940195 - 2² = 19940191 is a prime.

It is a super-2 number, since 2×19940195² = 795222753276050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19940191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13199 + ... + 14631.

It is an arithmetic number, because the mean of its divisors is an integer number (1144332).

Almost surely, 2^19940195 is an apocalyptic number.

19940195 is a deficient number, since it is larger than the sum of its proper divisors (7523773).

19940195 is a wasteful number, since it uses less digits than its factorization.

19940195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483 (or 1472 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 19940195 is about 4465.4445467389. Note that the first 3 decimals coincide. The cubic root of 19940195 is about 271.1709319544.

The spelling of 19940195 in words is "nineteen million, nine hundred forty thousand, one hundred ninety-five".