20717097 has 4 divisors (see below), whose sum is σ = 27622800. Its totient is φ = 13811396.

The previous prime is 20717093. The next prime is 20717113. The reversal of 20717097 is 79071702.

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 20717097 - 2² = 20717093 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20717093) 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, 3452847 + ... + 3452852.

It is an arithmetic number, because the mean of its divisors is an integer number (6905700).

Almost surely, 2^20717097 is an apocalyptic number.

It is an amenable number.

20717097 is a deficient number, since it is larger than the sum of its proper divisors (6905703).

20717097 is an equidigital number, since it uses as much as digits as its factorization.

20717097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6905702.

The product of its (nonzero) digits is 6174, while the sum is 33.

The square root of 20717097 is about 4551.6037832834. The cubic root of 20717097 is about 274.6479108366.

Adding to 20717097 its reverse (79071702), we get a palindrome (99788799).

The spelling of 20717097 in words is "twenty million, seven hundred seventeen thousand, ninety-seven".