20807097 has 4 divisors (see below), whose sum is σ = 27742800. Its totient is φ = 13871396.

The previous prime is 20807093. The next prime is 20807153. The reversal of 20807097 is 79070802.

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 20807097 - 2² = 20807093 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20807093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3467847 + ... + 3467852.

It is an arithmetic number, because the mean of its divisors is an integer number (6935700).

Almost surely, 2^20807097 is an apocalyptic number.

It is an amenable number.

20807097 is a deficient number, since it is larger than the sum of its proper divisors (6935703).

20807097 is an equidigital number, since it uses as much as digits as its factorization.

20807097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6935702.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 20807097 is about 4561.4796941343. The cubic root of 20807097 is about 275.0450482675.

Adding to 20807097 its reverse (79070802), we get a palindrome (99877899).

The spelling of 20807097 in words is "twenty million, eight hundred seven thousand, ninety-seven".