20641553179 has 8 divisors (see below), whose sum is σ = 22288022960. Its totient is φ = 19003463136.

The previous prime is 20641553173. The next prime is 20641553209. The reversal of 20641553179 is 97135514602.

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 20641553179 - 2¹¹ = 20641551131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20641553173) 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, 2089812 + ... + 2099665.

It is an arithmetic number, because the mean of its divisors is an integer number (2786002870).

Almost surely, 2^20641553179 is an apocalyptic number.

20641553179 is a deficient number, since it is larger than the sum of its proper divisors (1646469781).

20641553179 is a wasteful number, since it uses less digits than its factorization.

20641553179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4189869.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 20641553179 in words is "twenty billion, six hundred forty-one million, five hundred fifty-three thousand, one hundred seventy-nine".