20806533463 has 4 divisors (see below), whose sum is σ = 20813114728. Its totient is φ = 20799952200.

The previous prime is 20806533421. The next prime is 20806533467. The reversal of 20806533463 is 36433560802.

It is a happy number.

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 20806533463 - 2²⁹ = 20269662551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20806533467) 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, 3285888 + ... + 3292213.

It is an arithmetic number, because the mean of its divisors is an integer number (5203278682).

Almost surely, 2^20806533463 is an apocalyptic number.

20806533463 is a deficient number, since it is larger than the sum of its proper divisors (6581265).

20806533463 is an equidigital number, since it uses as much as digits as its factorization.

20806533463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6581264.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 20806533463 in words is "twenty billion, eight hundred six million, five hundred thirty-three thousand, four hundred sixty-three".