20633241643 has 16 divisors (see below), whose sum is σ = 23980411584. Its totient is φ = 17386277760.

The previous prime is 20633241617. The next prime is 20633241661. The reversal of 20633241643 is 34614233602.

It is a cyclic number.

It is not a de Polignac number, because 20633241643 - 2¹³ = 20633233451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20633241599 and 20633241608.

It is not an unprimeable number, because it can be changed into a prime (20633241443) 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 15 ways as a sum of consecutive naturals, for example, 840621 + ... + 864817.

It is an arithmetic number, because the mean of its divisors is an integer number (1498775724).

Almost surely, 2^20633241643 is an apocalyptic number.

20633241643 is a deficient number, since it is larger than the sum of its proper divisors (3347169941).

20633241643 is a wasteful number, since it uses less digits than its factorization.

20633241643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26262.

The product of its (nonzero) digits is 62208, while the sum is 34.

The spelling of 20633241643 in words is "twenty billion, six hundred thirty-three million, two hundred forty-one thousand, six hundred forty-three".