20321753305 has 16 divisors (see below), whose sum is σ = 27872164224. Its totient is φ = 13933751040.

The previous prime is 20321753303. The next prime is 20321753311. The reversal of 20321753305 is 50335712302.

It is not a de Polignac number, because 20321753305 - 2¹ = 20321753303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20321753303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 731265 + ... + 758545.

It is an arithmetic number, because the mean of its divisors is an integer number (1742010264).

Almost surely, 2^20321753305 is an apocalyptic number.

It is an amenable number.

20321753305 is a deficient number, since it is larger than the sum of its proper divisors (7550410919).

20321753305 is a wasteful number, since it uses less digits than its factorization.

20321753305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48576.

The product of its (nonzero) digits is 18900, while the sum is 31.

The spelling of 20321753305 in words is "twenty billion, three hundred twenty-one million, seven hundred fifty-three thousand, three hundred five".