20200697 has 4 divisors (see below), whose sum is σ = 22037136. Its totient is φ = 18364260.

The previous prime is 20200681. The next prime is 20200703. The reversal of 20200697 is 79600202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20200697 - 2⁴ = 20200681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20200657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918203 + ... + 918224.

It is an arithmetic number, because the mean of its divisors is an integer number (5509284).

Almost surely, 2^20200697 is an apocalyptic number.

It is an amenable number.

20200697 is a deficient number, since it is larger than the sum of its proper divisors (1836439).

20200697 is a wasteful number, since it uses less digits than its factorization.

20200697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836438.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20200697 is about 4494.5185504123. The cubic root of 20200697 is about 272.3467005213.

Adding to 20200697 its reverse (79600202), we get a palindrome (99800899).

The spelling of 20200697 in words is "twenty million, two hundred thousand, six hundred ninety-seven".