20822461661 has 8 divisors (see below), whose sum is σ = 21177736800. Its totient is φ = 20467265040.

The previous prime is 20822461613. The next prime is 20822461663. The reversal of 20822461661 is 16616422802.

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 20822461661 - 2¹⁴ = 20822445277 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 (20822461663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814055 + ... + 839243.

It is an arithmetic number, because the mean of its divisors is an integer number (2647217100).

Almost surely, 2^20822461661 is an apocalyptic number.

It is an amenable number.

20822461661 is a deficient number, since it is larger than the sum of its proper divisors (355275139).

20822461661 is a wasteful number, since it uses less digits than its factorization.

20822461661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39259.

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 20822461661 in words is "twenty billion, eight hundred twenty-two million, four hundred sixty-one thousand, six hundred sixty-one".