20653352705 has 4 divisors (see below), whose sum is σ = 24784023252. Its totient is φ = 16522682160.

The previous prime is 20653352653. The next prime is 20653352723. The reversal of 20653352705 is 50725335602.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2716911376 + 17936441329 = 52124^2 + 133927^2 .

It is not a de Polignac number, because 20653352705 - 2⁶ = 20653352641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2065335266 + ... + 2065335275.

It is an arithmetic number, because the mean of its divisors is an integer number (6196005813).

Almost surely, 2^20653352705 is an apocalyptic number.

It is an amenable number.

20653352705 is a deficient number, since it is larger than the sum of its proper divisors (4130670547).

20653352705 is an equidigital number, since it uses as much as digits as its factorization.

20653352705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4130670546.

The product of its (nonzero) digits is 189000, while the sum is 38.

The spelling of 20653352705 in words is "twenty billion, six hundred fifty-three million, three hundred fifty-two thousand, seven hundred five".