20225697 has 4 divisors (see below), whose sum is σ = 26967600. Its totient is φ = 13483796.

The previous prime is 20225693. The next prime is 20225719. The reversal of 20225697 is 79652202.

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 a cyclic number.

It is not a de Polignac number, because 20225697 - 2² = 20225693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20225693) 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, 3370947 + ... + 3370952.

It is an arithmetic number, because the mean of its divisors is an integer number (6741900).

Almost surely, 2^20225697 is an apocalyptic number.

It is an amenable number.

20225697 is a deficient number, since it is larger than the sum of its proper divisors (6741903).

20225697 is an equidigital number, since it uses as much as digits as its factorization.

20225697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6741902.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20225697 is about 4497.2988559801. The cubic root of 20225697 is about 272.4590045783.

Adding to 20225697 its reverse (79652202), we get a palindrome (99877899).

The spelling of 20225697 in words is "twenty million, two hundred twenty-five thousand, six hundred ninety-seven".