20245797 has 24 divisors (see below), whose sum is σ = 34358688. Its totient is φ = 11325600.

The previous prime is 20245777. The next prime is 20245807. The reversal of 20245797 is 79754202.

It is not a de Polignac number, because 20245797 - 2⁷ = 20245669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20245777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6579 + ... + 9152.

It is an arithmetic number, because the mean of its divisors is an integer number (1431612).

Almost surely, 2^20245797 is an apocalyptic number.

It is an amenable number.

20245797 is a deficient number, since it is larger than the sum of its proper divisors (14112891).

20245797 is a wasteful number, since it uses less digits than its factorization.

20245797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15761 (or 15758 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 20245797 is about 4499.5329757654. The cubic root of 20245797 is about 272.5492299463.

Adding to 20245797 its reverse (79754202), we get a palindrome (99999999).

The spelling of 20245797 in words is "twenty million, two hundred forty-five thousand, seven hundred ninety-seven".