21087083520000 has 840 divisors, whose sum is σ = 76364467254504. Its totient is φ = 5605097472000.

The previous prime is 21087083519993. The next prime is 21087083520011. The reversal of 21087083520000 is 2538078012.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 20413439484 + ... + 20413440516.

Almost surely, 2^{21087083520000} is an apocalyptic number.

21087083520000 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 21087083520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38182233627252).

21087083520000 is an abundant number, since it is smaller than the sum of its proper divisors (55277383734504).

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

21087083520000 is an equidigital number, since it uses as much as digits as its factorization.

21087083520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528 (or 1486 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 21087083520000 in words is "twenty-one trillion, eighty-seven billion, eighty-three million, five hundred twenty thousand".