20710591149 has 4 divisors (see below), whose sum is σ = 27614121536. Its totient is φ = 13807060764.

The previous prime is 20710591093. The next prime is 20710591177. The reversal of 20710591149 is 94119501702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20710591149 - 2³¹ = 18563107501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20710591249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3451765189 + ... + 3451765194.

It is an arithmetic number, because the mean of its divisors is an integer number (6903530384).

Almost surely, 2^20710591149 is an apocalyptic number.

It is an amenable number.

20710591149 is a deficient number, since it is larger than the sum of its proper divisors (6903530387).

20710591149 is an equidigital number, since it uses as much as digits as its factorization.

20710591149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6903530386.

The product of its (nonzero) digits is 22680, while the sum is 39.

The spelling of 20710591149 in words is "twenty billion, seven hundred ten million, five hundred ninety-one thousand, one hundred forty-nine".