20846452859490 has 128 divisors (see below), whose sum is σ = 52811593574400. Its totient is φ = 5255794874880.

The previous prime is 20846452859473. The next prime is 20846452859509. The reversal of 20846452859490 is 9495825464802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 182391981 + ... + 182506239.

It is an arithmetic number, because the mean of its divisors is an integer number (412590574800).

Almost surely, 2^{20846452859490} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20846452859490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26405796787200).

20846452859490 is an abundant number, since it is smaller than the sum of its proper divisors (31965140714910).

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

20846452859490 is a wasteful number, since it uses less digits than its factorization.

20846452859490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117352.

The product of its (nonzero) digits is 199065600, while the sum is 66.

The spelling of 20846452859490 in words is "twenty trillion, eight hundred forty-six billion, four hundred fifty-two million, eight hundred fifty-nine thousand, four hundred ninety".