21390606130608 has 1200 divisors, whose sum is σ = 76269233040000. Its totient is φ = 5742271180800.

The previous prime is 21390606130573. The next prime is 21390606130613. The reversal of 21390606130608 is 80603160609312.

21390606130608 is a `hidden beast` number, since 2 + 1 + 3 + 9 + 0 + 6 + 0 + 6 + 1 + 30 + 608 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 10700652393 + ... + 10700654391.

It is an arithmetic number, because the mean of its divisors is an integer number (63557694200).

Almost surely, 2^{21390606130608} 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 21390606130608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38134616520000).

21390606130608 is an abundant number, since it is smaller than the sum of its proper divisors (54878626909392).

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

21390606130608 is a wasteful number, since it uses less digits than its factorization.

21390606130608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2264 (or 2238 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 21390606130608 in words is "twenty-one trillion, three hundred ninety billion, six hundred six million, one hundred thirty thousand, six hundred eight".