20543313545 has 8 divisors (see below), whose sum is σ = 25069806720. Its totient is φ = 16156097200.

The previous prime is 20543313533. The next prime is 20543313629. The reversal of 20543313545 is 54531334502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20543313545 - 2⁴ = 20543313529 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34818881 + ... + 34819470.

It is an arithmetic number, because the mean of its divisors is an integer number (3133725840).

Almost surely, 2^20543313545 is an apocalyptic number.

It is an amenable number.

20543313545 is a deficient number, since it is larger than the sum of its proper divisors (4526493175).

20543313545 is an equidigital number, since it uses as much as digits as its factorization.

20543313545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69638415.

The product of its (nonzero) digits is 108000, while the sum is 35.

The spelling of 20543313545 in words is "twenty billion, five hundred forty-three million, three hundred thirteen thousand, five hundred forty-five".