20760091 has 6 divisors (see below), whose sum is σ = 22819076. Its totient is φ = 18872700.

The previous prime is 20760083. The next prime is 20760097. The reversal of 20760091 is 19006702.

It is not a de Polignac number, because 20760091 - 2³ = 20760083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20760097) 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 5 ways as a sum of consecutive naturals, for example, 85665 + ... + 85906.

Almost surely, 2^20760091 is an apocalyptic number.

20760091 is a deficient number, since it is larger than the sum of its proper divisors (2058985).

20760091 is a wasteful number, since it uses less digits than its factorization.

20760091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171593 (or 171582 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 20760091 is about 4556.3242860885. The cubic root of 20760091 is about 274.8377709827.

Adding to 20760091 its reverse (19006702), we get a palindrome (39766793).

The spelling of 20760091 in words is "twenty million, seven hundred sixty thousand, ninety-one".