20954841601 has 4 divisors (see below), whose sum is σ = 20955325104. Its totient is φ = 20954358100.

The previous prime is 20954841569. The next prime is 20954841647. The reversal of 20954841601 is 10614845902.

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 20954841601 - 2⁵ = 20954841569 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20954845601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169555 + ... + 265816.

It is an arithmetic number, because the mean of its divisors is an integer number (5238831276).

Almost surely, 2^20954841601 is an apocalyptic number.

It is an amenable number.

20954841601 is a deficient number, since it is larger than the sum of its proper divisors (483503).

20954841601 is an equidigital number, since it uses as much as digits as its factorization.

20954841601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483502.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 20954841601 in words is "twenty billion, nine hundred fifty-four million, eight hundred forty-one thousand, six hundred one".