21443034433040 has 160 divisors (see below), whose sum is σ = 55288621516032. Its totient is φ = 7668294912000.

The previous prime is 21443034433001. The next prime is 21443034433127. The reversal of 21443034433040 is 4033443034412.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 336165950 + ... + 336229730.

Almost surely, 2^{21443034433040} is an apocalyptic number.

21443034433040 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 21443034433040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27644310758016).

21443034433040 is an abundant number, since it is smaller than the sum of its proper divisors (33845587082992).

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

21443034433040 is a wasteful number, since it uses less digits than its factorization.

21443034433040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70129 (or 70123 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 35.

Adding to 21443034433040 its reverse (4033443034412), we get a palindrome (25476477467452).

The spelling of 21443034433040 in words is "twenty-one trillion, four hundred forty-three billion, thirty-four million, four hundred thirty-three thousand, forty".