20446653523 has 4 divisors (see below), whose sum is σ = 20449695240. Its totient is φ = 20443611808.

The previous prime is 20446653503. The next prime is 20446653527. The reversal of 20446653523 is 32535664402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20446653523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20446653527) 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, 1510753 + ... + 1524226.

It is an arithmetic number, because the mean of its divisors is an integer number (5112423810).

Almost surely, 2^20446653523 is an apocalyptic number.

20446653523 is a deficient number, since it is larger than the sum of its proper divisors (3041717).

20446653523 is an equidigital number, since it uses as much as digits as its factorization.

20446653523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041716.

The product of its (nonzero) digits is 518400, while the sum is 40.

The spelling of 20446653523 in words is "twenty billion, four hundred forty-six million, six hundred fifty-three thousand, five hundred twenty-three".