20113197 has 12 divisors (see below), whose sum is σ = 29039904. Its totient is φ = 12377040.

The previous prime is 20113189. The next prime is 20113213. The reversal of 20113197 is 79131102.

It is not a de Polignac number, because 20113197 - 2³ = 20113189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19329 + ... + 20342.

It is an arithmetic number, because the mean of its divisors is an integer number (2419992).

Almost surely, 2^20113197 is an apocalyptic number.

It is an amenable number.

20113197 is a deficient number, since it is larger than the sum of its proper divisors (8926707).

20113197 is a wasteful number, since it uses less digits than its factorization.

20113197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39700 (or 39687 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 20113197 is about 4484.7739073447. The cubic root of 20113197 is about 271.9529050888.

Adding to 20113197 its reverse (79131102), we get a palindrome (99244299).

The spelling of 20113197 in words is "twenty million, one hundred thirteen thousand, one hundred ninety-seven".