20595497 has 4 divisors (see below), whose sum is σ = 22179780. Its totient is φ = 19011216.

The previous prime is 20595473. The next prime is 20595503. The reversal of 20595497 is 79459502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79459502 = 2 ⋅39729751.

It can be written as a sum of positive squares in 2 ways, for example, as 3916441 + 16679056 = 1979^2 + 4084^2 .

It is a cyclic number.

It is not a de Polignac number, because 20595497 - 2⁸ = 20595241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20595437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 792122 + ... + 792147.

It is an arithmetic number, because the mean of its divisors is an integer number (5544945).

Almost surely, 2^20595497 is an apocalyptic number.

It is an amenable number.

20595497 is a deficient number, since it is larger than the sum of its proper divisors (1584283).

20595497 is a wasteful number, since it uses less digits than its factorization.

20595497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584282.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 20595497 is about 4538.2261953323. The cubic root of 20595497 is about 274.1095030021.

The spelling of 20595497 in words is "twenty million, five hundred ninety-five thousand, four hundred ninety-seven".