20801633560377 has 4 divisors (see below), whose sum is σ = 27735511413840. Its totient is φ = 13867755706916.

The previous prime is 20801633560339. The next prime is 20801633560381. The reversal of 20801633560377 is 77306533610802.

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 20801633560377 - 2¹⁶ = 20801633494841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20801633560307) 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, 3466938926727 + ... + 3466938926732.

It is an arithmetic number, because the mean of its divisors is an integer number (6933877853460).

Almost surely, 2^{20801633560377} is an apocalyptic number.

It is an amenable number.

20801633560377 is a deficient number, since it is larger than the sum of its proper divisors (6933877853463).

20801633560377 is an equidigital number, since it uses as much as digits as its factorization.

20801633560377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6933877853462.

The product of its (nonzero) digits is 3810240, while the sum is 51.

The spelling of 20801633560377 in words is "twenty trillion, eight hundred one billion, six hundred thirty-three million, five hundred sixty thousand, three hundred seventy-seven".