20653520443 has 8 divisors (see below), whose sum is σ = 20735737488. Its totient is φ = 20571465984.

The previous prime is 20653520423. The next prime is 20653520479. The reversal of 20653520443 is 34402535602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20653520443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20653520399 and 20653520408.

It is not an unprimeable number, because it can be changed into a prime (20653520423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217155 + ... + 297427.

It is an arithmetic number, because the mean of its divisors is an integer number (2591967186).

Almost surely, 2^20653520443 is an apocalyptic number.

20653520443 is a deficient number, since it is larger than the sum of its proper divisors (82217045).

20653520443 is an equidigital number, since it uses as much as digits as its factorization.

20653520443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81293.

The product of its (nonzero) digits is 86400, while the sum is 34.

The spelling of 20653520443 in words is "twenty billion, six hundred fifty-three million, five hundred twenty thousand, four hundred forty-three".