19800194 has 16 divisors (see below), whose sum is σ = 31138560. Its totient is φ = 9424800.

The previous prime is 19800191. The next prime is 19800197. The reversal of 19800194 is 49100891.

It is an interprime number because it is at equal distance from previous prime (19800191) and next prime (19800197).

It is a self number, because there is not a number n which added to its sum of digits gives 19800194.

It is not an unprimeable number, because it can be changed into a prime (19800191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10094 + ... + 11894.

It is an arithmetic number, because the mean of its divisors is an integer number (1946160).

Almost surely, 2^19800194 is an apocalyptic number.

19800194 is a deficient number, since it is larger than the sum of its proper divisors (11338366).

19800194 is a wasteful number, since it uses less digits than its factorization.

19800194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2065.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 19800194 is about 4449.7408913329. The cubic root of 19800194 is about 270.5348064586.

The spelling of 19800194 in words is "nineteen million, eight hundred thousand, one hundred ninety-four".