20365197 has 16 divisors (see below), whose sum is σ = 27820800. Its totient is φ = 13246272.

The previous prime is 20365193. The next prime is 20365229. The reversal of 20365197 is 79156302.

It is not a de Polignac number, because 20365197 - 2² = 20365193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20365193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55308 + ... + 55674.

It is an arithmetic number, because the mean of its divisors is an integer number (1738800).

Almost surely, 2^20365197 is an apocalyptic number.

It is an amenable number.

20365197 is a deficient number, since it is larger than the sum of its proper divisors (7455603).

20365197 is a wasteful number, since it uses less digits than its factorization.

20365197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 20365197 is about 4512.7815147645. The cubic root of 20365197 is about 273.0839683206.

The spelling of 20365197 in words is "twenty million, three hundred sixty-five thousand, one hundred ninety-seven".