21452042533040 has 160 divisors (see below), whose sum is σ = 60031276800000. Its totient is φ = 6964388895744.

The previous prime is 21452042533027. The next prime is 21452042533093. The reversal of 21452042533040 is 4033524025412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

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 31 ways as a sum of consecutive naturals, for example, 20765066 + ... + 21773654.

It is an arithmetic number, because the mean of its divisors is an integer number (375195480000).

Almost surely, 2^{21452042533040} is an apocalyptic number.

21452042533040 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 21452042533040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30015638400000).

21452042533040 is an abundant number, since it is smaller than the sum of its proper divisors (38579234266960).

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

21452042533040 is a wasteful number, since it uses less digits than its factorization.

21452042533040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010627 (or 1010621 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 21452042533040 its reverse (4033524025412), we get a palindrome (25485566558452).

The spelling of 21452042533040 in words is "twenty-one trillion, four hundred fifty-two billion, forty-two million, five hundred thirty-three thousand, forty".