20801375510667 has 4 divisors (see below), whose sum is σ = 27735167347560. Its totient is φ = 13867583673776.

The previous prime is 20801375510659. The next prime is 20801375510681. The reversal of 20801375510667 is 76601557310802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20801375510667 - 2³ = 20801375510659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20801375510627) 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, 3466895918442 + ... + 3466895918447.

It is an arithmetic number, because the mean of its divisors is an integer number (6933791836890).

Almost surely, 2^{20801375510667} is an apocalyptic number.

20801375510667 is a deficient number, since it is larger than the sum of its proper divisors (6933791836893).

20801375510667 is an equidigital number, since it uses as much as digits as its factorization.

20801375510667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6933791836892.

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 20801375510667 in words is "twenty trillion, eight hundred one billion, three hundred seventy-five million, five hundred ten thousand, six hundred sixty-seven".