20245697 has 16 divisors (see below), whose sum is σ = 22617600. Its totient is φ = 18040320.

The previous prime is 20245679. The next prime is 20245699. The reversal of 20245697 is 79654202.

It is a cyclic number.

It is not a de Polignac number, because 20245697 - 2⁸ = 20245441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20245699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21329 + ... + 22257.

It is an arithmetic number, because the mean of its divisors is an integer number (1413600).

Almost surely, 2^20245697 is an apocalyptic number.

It is an amenable number.

20245697 is a deficient number, since it is larger than the sum of its proper divisors (2371903).

20245697 is a wasteful number, since it uses less digits than its factorization.

20245697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 20245697 is about 4499.5218634873. The cubic root of 20245697 is about 272.5487812117.

Adding to 20245697 its reverse (79654202), we get a palindrome (99899899).

The spelling of 20245697 in words is "twenty million, two hundred forty-five thousand, six hundred ninety-seven".