21067303040 has 384 divisors, whose sum is σ = 63544694400. Its totient is φ = 6632865792.

The previous prime is 21067303039. The next prime is 21067303073. The reversal of 21067303040 is 4030376012.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22923701 + ... + 22924619.

It is an arithmetic number, because the mean of its divisors is an integer number (165480975).

Almost surely, 2^21067303040 is an apocalyptic number.

21067303040 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 21067303040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31772347200).

21067303040 is an abundant number, since it is smaller than the sum of its proper divisors (42477391360).

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

21067303040 is a wasteful number, since it uses less digits than its factorization.

21067303040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

Adding to 21067303040 its reverse (4030376012), we get a palindrome (25097679052).

The spelling of 21067303040 in words is "twenty-one billion, sixty-seven million, three hundred three thousand, forty".