20355097 has 4 divisors (see below), whose sum is σ = 23262976. Its totient is φ = 17447220.

The previous prime is 20355067. The next prime is 20355107. The reversal of 20355097 is 79055302.

It is a happy number.

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 not a de Polignac number, because 20355097 - 2⁷ = 20354969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20355037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1453929 + ... + 1453942.

It is an arithmetic number, because the mean of its divisors is an integer number (5815744).

Almost surely, 2^20355097 is an apocalyptic number.

It is an amenable number.

20355097 is a deficient number, since it is larger than the sum of its proper divisors (2907879).

20355097 is an equidigital number, since it uses as much as digits as its factorization.

20355097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907878.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 20355097 is about 4511.6623322230. The cubic root of 20355097 is about 273.0388160580.

The spelling of 20355097 in words is "twenty million, three hundred fifty-five thousand, ninety-seven".