20215097 has 12 divisors (see below), whose sum is σ = 23669136. Its totient is φ = 17214120.

The previous prime is 20215093. The next prime is 20215099. The reversal of 20215097 is 79051202.

It is not a de Polignac number, because 20215097 - 2² = 20215093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20215093) 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 11 ways as a sum of consecutive naturals, for example, 6722 + ... + 9252.

It is an arithmetic number, because the mean of its divisors is an integer number (1972428).

Almost surely, 2^20215097 is an apocalyptic number.

It is an amenable number.

20215097 is a deficient number, since it is larger than the sum of its proper divisors (3454039).

20215097 is a wasteful number, since it uses less digits than its factorization.

20215097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708 (or 2701 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 20215097 is about 4496.1202163643. The cubic root of 20215097 is about 272.4113989651.

Adding to 20215097 its reverse (79051202), we get a palindrome (99266299).

The spelling of 20215097 in words is "twenty million, two hundred fifteen thousand, ninety-seven".