21501010243482 has 288 divisors, whose sum is σ = 58537917065664. Its totient is φ = 5203996761600.

The previous prime is 21501010243477. The next prime is 21501010243511. The reversal of 21501010243482 is 28434201010512.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 71064958 + ... + 71366870.

It is an arithmetic number, because the mean of its divisors is an integer number (203256656478).

Almost surely, 2^{21501010243482} is an apocalyptic number.

21501010243482 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21501010243482, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29268958532832).

21501010243482 is an abundant number, since it is smaller than the sum of its proper divisors (37036906822182).

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

21501010243482 is a wasteful number, since it uses less digits than its factorization.

21501010243482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302042 (or 302016 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

Adding to 21501010243482 its reverse (28434201010512), we get a palindrome (49935211253994).

The spelling of 21501010243482 in words is "twenty-one trillion, five hundred one billion, ten million, two hundred forty-three thousand, four hundred eighty-two".