21839020896 has 864 divisors, whose sum is σ = 81016752096. Its totient is φ = 5109350400.

The previous prime is 21839020891. The next prime is 21839020909. The reversal of 21839020896 is 69802093812.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21839020891) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 358016706 + ... + 358016766.

It is an arithmetic number, because the mean of its divisors is an integer number (93769389).

Almost surely, 2^21839020896 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 21839020896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40508376048).

21839020896 is an abundant number, since it is smaller than the sum of its proper divisors (59177731200).

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

21839020896 is a wasteful number, since it uses less digits than its factorization.

21839020896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The spelling of 21839020896 in words is "twenty-one billion, eight hundred thirty-nine million, twenty thousand, eight hundred ninety-six".