20715097 has 8 divisors (see below), whose sum is σ = 22486016. Its totient is φ = 18969552.

The previous prime is 20715091. The next prime is 20715113. The reversal of 20715097 is 79051702.

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 20715097 - 2¹⁵ = 20682329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20715091) 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, 4623 + ... + 7924.

It is an arithmetic number, because the mean of its divisors is an integer number (2810752).

Almost surely, 2^20715097 is an apocalyptic number.

It is an amenable number.

20715097 is a deficient number, since it is larger than the sum of its proper divisors (1770919).

20715097 is a wasteful number, since it uses less digits than its factorization.

20715097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12687.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 20715097 is about 4551.3840752017. The cubic root of 20715097 is about 274.6390725086.

Adding to 20715097 its reverse (79051702), we get a palindrome (99766799).

The spelling of 20715097 in words is "twenty million, seven hundred fifteen thousand, ninety-seven".