20727097 has 4 divisors (see below), whose sum is σ = 21946356. Its totient is φ = 19507840.

The previous prime is 20727089. The next prime is 20727103. The reversal of 20727097 is 79072702.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79072702 = 2 ⋅39536351.

It can be written as a sum of positive squares in 2 ways, for example, as 14356521 + 6370576 = 3789^2 + 2524^2 .

It is not a de Polignac number, because 20727097 - 2³ = 20727089 is a prime.

It is a super-2 number, since 2×20727097² = 859225100094818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20727037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609604 + ... + 609637.

It is an arithmetic number, because the mean of its divisors is an integer number (5486589).

Almost surely, 2^20727097 is an apocalyptic number.

It is an amenable number.

20727097 is a deficient number, since it is larger than the sum of its proper divisors (1219259).

20727097 is a wasteful number, since it uses less digits than its factorization.

20727097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219258.

The product of its (nonzero) digits is 12348, while the sum is 34.

The square root of 20727097 is about 4552.7021646490. The cubic root of 20727097 is about 274.6920939466.

Adding to 20727097 its reverse (79072702), we get a palindrome (99799799).

The spelling of 20727097 in words is "twenty million, seven hundred twenty-seven thousand, ninety-seven".