20824736149 has 4 divisors (see below), whose sum is σ = 23799698464. Its totient is φ = 17849773836.

The previous prime is 20824736123. The next prime is 20824736183. The reversal of 20824736149 is 94163742802.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 20824736149 - 2⁹ = 20824735637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20824736099 and 20824736108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20824736189) 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 3 ways as a sum of consecutive naturals, for example, 1487481147 + ... + 1487481160.

It is an arithmetic number, because the mean of its divisors is an integer number (5949924616).

Almost surely, 2^20824736149 is an apocalyptic number.

It is an amenable number.

20824736149 is a deficient number, since it is larger than the sum of its proper divisors (2974962315).

20824736149 is an equidigital number, since it uses as much as digits as its factorization.

20824736149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974962314.

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 20824736149 in words is "twenty billion, eight hundred twenty-four million, seven hundred thirty-six thousand, one hundred forty-nine".