20236552049 has 4 divisors (see below), whose sum is σ = 23127488064. Its totient is φ = 17345616036.

The previous prime is 20236552009. The next prime is 20236552087. The reversal of 20236552049 is 94025563202.

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 de Polignac number, because none of the positive numbers 2^k-20236552049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20236552009) 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, 1445467997 + ... + 1445468010.

It is an arithmetic number, because the mean of its divisors is an integer number (5781872016).

Almost surely, 2^20236552049 is an apocalyptic number.

It is an amenable number.

20236552049 is a deficient number, since it is larger than the sum of its proper divisors (2890936015).

20236552049 is an equidigital number, since it uses as much as digits as its factorization.

20236552049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890936014.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 20236552049 in words is "twenty billion, two hundred thirty-six million, five hundred fifty-two thousand, forty-nine".