21088325376 has 504 divisors, whose sum is σ = 69971761440. Its totient is φ = 6328295424.

The previous prime is 21088325341. The next prime is 21088325381. The reversal of 21088325376 is 67352388012.

21088325376 is a `hidden beast` number, since 2 + 1 + 0 + 88 + 32 + 537 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 916883701 + ... + 916883723.

It is an arithmetic number, because the mean of its divisors is an integer number (138832860).

Almost surely, 2^21088325376 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 21088325376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34985880720).

21088325376 is an abundant number, since it is smaller than the sum of its proper divisors (48883436064).

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

21088325376 is an frugal number, since it uses more digits than its factorization.

21088325376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 21088325376 in words is "twenty-one billion, eighty-eight million, three hundred twenty-five thousand, three hundred seventy-six".