19936197 has 6 divisors (see below), whose sum is σ = 28796742. Its totient is φ = 13290792.

The previous prime is 19936183. The next prime is 19936199. The reversal of 19936197 is 79163991.

It can be written as a sum of positive squares in only one way, i.e., 15992001 + 3944196 = 3999^2 + 1986^2 .

It is not a de Polignac number, because 19936197 - 2⁴ = 19936181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19936199) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1107558 + ... + 1107575.

It is an arithmetic number, because the mean of its divisors is an integer number (4799457).

Almost surely, 2^19936197 is an apocalyptic number.

It is an amenable number.

19936197 is a deficient number, since it is larger than the sum of its proper divisors (8860545).

19936197 is a wasteful number, since it uses less digits than its factorization.

19936197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215139 (or 2215136 counting only the distinct ones).

The product of its digits is 91854, while the sum is 45.

The square root of 19936197 is about 4464.9968645006. The cubic root of 19936197 is about 271.1528075270.

The spelling of 19936197 in words is "nineteen million, nine hundred thirty-six thousand, one hundred ninety-seven".