20546422464 has 112 divisors (see below), whose sum is σ = 57277284480. Its totient is φ = 6482257920.

The previous prime is 20546422453. The next prime is 20546422487. The reversal of 20546422464 is 46422464502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5400787 + ... + 5404589.

Almost surely, 2^20546422464 is an apocalyptic number.

20546422464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20546422464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28638642240).

20546422464 is an abundant number, since it is smaller than the sum of its proper divisors (36730862016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20546422464 is a wasteful number, since it uses less digits than its factorization.

20546422464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5318 (or 5308 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 39.

Adding to 20546422464 its reverse (46422464502), we get a palindrome (66968886966).

The spelling of 20546422464 in words is "twenty billion, five hundred forty-six million, four hundred twenty-two thousand, four hundred sixty-four".