20868964033 has 4 divisors (see below), whose sum is σ = 20952107568. Its totient is φ = 20785820500.

The previous prime is 20868964019. The next prime is 20868964099. The reversal of 20868964033 is 33046986802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20868964033 - 2¹³ = 20868955841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20868964433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41571391 + ... + 41571892.

It is an arithmetic number, because the mean of its divisors is an integer number (5238026892).

Almost surely, 2^20868964033 is an apocalyptic number.

It is an amenable number.

20868964033 is a deficient number, since it is larger than the sum of its proper divisors (83143535).

20868964033 is an equidigital number, since it uses as much as digits as its factorization.

20868964033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83143534.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 20868964033 in words is "twenty billion, eight hundred sixty-eight million, nine hundred sixty-four thousand, thirty-three".