20869874016 has 96 divisors (see below), whose sum is σ = 58580752608. Its totient is φ = 6482534400.

The previous prime is 20869873991. The next prime is 20869874029. The reversal of 20869874016 is 61047896802.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×20869874016³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 20869874016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101526 + ... + 228138.

It is an arithmetic number, because the mean of its divisors is an integer number (610216173).

Almost surely, 2^20869874016 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 20869874016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29290376304).

20869874016 is an abundant number, since it is smaller than the sum of its proper divisors (37710878592).

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

20869874016 is a wasteful number, since it uses less digits than its factorization.

20869874016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126744 (or 126736 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The spelling of 20869874016 in words is "twenty billion, eight hundred sixty-nine million, eight hundred seventy-four thousand, sixteen".