21570706040000 has 280 divisors, whose sum is σ = 57622725737808. Its totient is φ = 7961817600000.

The previous prime is 21570706039997. The next prime is 21570706040083. The reversal of 21570706040000 is 4060707512.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2094034850 + ... + 2094045150.

Almost surely, 2^{21570706040000} is an apocalyptic number.

21570706040000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21570706040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28811362868904).

21570706040000 is an abundant number, since it is smaller than the sum of its proper divisors (36052019697808).

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

21570706040000 is a wasteful number, since it uses less digits than its factorization.

21570706040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14373 (or 14348 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

Adding to 21570706040000 its reverse (4060707512), we get a palindrome (21574766747512).

The spelling of 21570706040000 in words is "twenty-one trillion, five hundred seventy billion, seven hundred six million, forty thousand".