21896344498608 has 120 divisors (see below), whose sum is σ = 64901020586688. Its totient is φ = 6867641604096.

The previous prime is 21896344498597. The next prime is 21896344498619. The reversal of 21896344498608 is 80689444369812.

21896344498608 is a `hidden beast` number, since 2 + 1 + 8 + 9 + 6 + 3 + 4 + 4 + 4 + 9 + 8 + 608 = 666.

It is a Cunningham number, because it is equal to 4679353²-1.

It is an interprime number because it is at equal distance from previous prime (21896344498597) and next prime (21896344498619).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8188866 + ... + 10528542.

Almost surely, 2^{21896344498608} 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 21896344498608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32450510293344).

21896344498608 is an abundant number, since it is smaller than the sum of its proper divisors (43004676088080).

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

21896344498608 is a wasteful number, since it uses less digits than its factorization.

21896344498608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343531 (or 2343522 counting only the distinct ones).

The product of its (nonzero) digits is 573308928, while the sum is 72.

The spelling of 21896344498608 in words is "twenty-one trillion, eight hundred ninety-six billion, three hundred forty-four million, four hundred ninety-eight thousand, six hundred eight".