21401596959570 has 384 divisors, whose sum is σ = 61753601415168. Its totient is φ = 5118374707200.

The previous prime is 21401596959551. The next prime is 21401596959571. The reversal of 21401596959570 is 7595969510412.

21401596959570 is a `hidden beast` number, since 2 + 1 + 4 + 0 + 1 + 5 + 9 + 6 + 9 + 59 + 570 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21401596959498 and 21401596959507.

It is not an unprimeable number, because it can be changed into a prime (21401596959571) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2219387169 + ... + 2219396811.

It is an arithmetic number, because the mean of its divisors is an integer number (160816670352).

Almost surely, 2^{21401596959570} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21401596959570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30876800707584).

21401596959570 is an abundant number, since it is smaller than the sum of its proper divisors (40352004455598).

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

21401596959570 is a wasteful number, since it uses less digits than its factorization.

21401596959570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10418 (or 10415 counting only the distinct ones).

The product of its (nonzero) digits is 30618000, while the sum is 63.

The spelling of 21401596959570 in words is "twenty-one trillion, four hundred one billion, five hundred ninety-six million, nine hundred fifty-nine thousand, five hundred seventy".