21067150656 has 112 divisors (see below), whose sum is σ = 59401764864. Its totient is φ = 6574081536.

The previous prime is 21067150627. The next prime is 21067150667. The reversal of 21067150656 is 65605176012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156801 + ... + 258303.

Almost surely, 2^21067150656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21067150656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29700882432).

21067150656 is an abundant number, since it is smaller than the sum of its proper divisors (38334614208).

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

21067150656 is a wasteful number, since it uses less digits than its factorization.

21067150656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101588 (or 101578 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 21067150656 in words is "twenty-one billion, sixty-seven million, one hundred fifty thousand, six hundred fifty-six".