21456076608 has 224 divisors, whose sum is σ = 66043576320. Its totient is φ = 6817789440.

The previous prime is 21456076573. The next prime is 21456076613. The reversal of 21456076608 is 80667065412.

21456076608 is a `hidden beast` number, since 2 + 14 + 560 + 76 + 6 + 0 + 8 = 666.

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, 14585313 + ... + 14586783.

Almost surely, 2^21456076608 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 21456076608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33021788160).

21456076608 is an abundant number, since it is smaller than the sum of its proper divisors (44587499712).

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

21456076608 is a wasteful number, since it uses less digits than its factorization.

21456076608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882 (or 1866 counting only the distinct ones).

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

The spelling of 21456076608 in words is "twenty-one billion, four hundred fifty-six million, seventy-six thousand, six hundred eight".