20819822016 has 224 divisors, whose sum is σ = 63845895168. Its totient is φ = 5865062400.

The previous prime is 20819821999. The next prime is 20819822027. The reversal of 20819822016 is 61022891802.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35109016 + ... + 35109608.

Almost surely, 2^20819822016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20819822016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31922947584).

20819822016 is an abundant number, since it is smaller than the sum of its proper divisors (43026073152).

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

20819822016 is a wasteful number, since it uses less digits than its factorization.

20819822016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 929 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The spelling of 20819822016 in words is "twenty billion, eight hundred nineteen million, eight hundred twenty-two thousand, sixteen".