20996891033 has 8 divisors (see below), whose sum is σ = 21279585600. Its totient is φ = 20715712848.

The previous prime is 20996891023. The next prime is 20996891039. The reversal of 20996891033 is 33019869902.

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

It is a cyclic number.

It is not a de Polignac number, because 20996891033 - 2⁸ = 20996890777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20996891039) 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, 351203 + ... + 406616.

It is an arithmetic number, because the mean of its divisors is an integer number (2659948200).

Almost surely, 2^20996891033 is an apocalyptic number.

It is an amenable number.

20996891033 is a deficient number, since it is larger than the sum of its proper divisors (282694567).

20996891033 is a wasteful number, since it uses less digits than its factorization.

20996891033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758191.

The product of its (nonzero) digits is 629856, while the sum is 50.

The spelling of 20996891033 in words is "twenty billion, nine hundred ninety-six million, eight hundred ninety-one thousand, thirty-three".