20540730323 has 4 divisors (see below), whose sum is σ = 20545113768. Its totient is φ = 20536346880.

The previous prime is 20540730319. The next prime is 20540730341. The reversal of 20540730323 is 32303704502.

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

It is a cyclic number.

It is not a de Polignac number, because 20540730323 - 2² = 20540730319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20540730383) 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, 2184686 + ... + 2194067.

It is an arithmetic number, because the mean of its divisors is an integer number (5136278442).

Almost surely, 2^20540730323 is an apocalyptic number.

20540730323 is a deficient number, since it is larger than the sum of its proper divisors (4383445).

20540730323 is an equidigital number, since it uses as much as digits as its factorization.

20540730323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4383444.

The product of its (nonzero) digits is 15120, while the sum is 29.

The spelling of 20540730323 in words is "twenty billion, five hundred forty million, seven hundred thirty thousand, three hundred twenty-three".