20840097 has 8 divisors (see below), whose sum is σ = 27953856. Its totient is φ = 13809872.

The previous prime is 20840087. The next prime is 20840107. The reversal of 20840097 is 79004802.

It is an interprime number because it is at equal distance from previous prime (20840087) and next prime (20840107).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20840097 - 2⁶ = 20840033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20840087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20298 + ... + 21299.

It is an arithmetic number, because the mean of its divisors is an integer number (3494232).

Almost surely, 2^20840097 is an apocalyptic number.

It is an amenable number.

20840097 is a deficient number, since it is larger than the sum of its proper divisors (7113759).

20840097 is a wasteful number, since it uses less digits than its factorization.

20840097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41767.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 20840097 is about 4565.0955083109. The cubic root of 20840097 is about 275.1903783663.

Adding to 20840097 its reverse (79004802), we get a palindrome (99844899).

The spelling of 20840097 in words is "twenty million, eight hundred forty thousand, ninety-seven".