20045097 has 16 divisors (see below), whose sum is σ = 29798080. Its totient is φ = 13317696.

The previous prime is 20045093. The next prime is 20045101. The reversal of 20045097 is 79054002.

20045097 is a `hidden beast` number, since 200 + 450 + 9 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (20045093) and next prime (20045101).

It is not a de Polignac number, because 20045097 - 2² = 20045093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20045097.

It is not an unprimeable number, because it can be changed into a prime (20045093) 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 15 ways as a sum of consecutive naturals, for example, 7998 + ... + 10200.

It is an arithmetic number, because the mean of its divisors is an integer number (1862380).

Almost surely, 2^20045097 is an apocalyptic number.

20045097 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20045097 is a deficient number, since it is larger than the sum of its proper divisors (9752983).

20045097 is a wasteful number, since it uses less digits than its factorization.

20045097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549 (or 2543 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20045097 is about 4477.1751138413. The cubic root of 20045097 is about 271.6456286584.

Adding to 20045097 its reverse (79054002), we get a palindrome (99099099).

The spelling of 20045097 in words is "twenty million, forty-five thousand, ninety-seven".