21946749213232 has 10 divisors (see below), whose sum is σ = 42521826600668. Its totient is φ = 10973374606608.

The previous prime is 21946749213163. The next prime is 21946749213247. The reversal of 21946749213232 is 23231294764912.

It is a super-3 number, since 3×21946749213232³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685835912898 + ... + 685835912929.

Almost surely, 2^{21946749213232} is an apocalyptic number.

It is an amenable number.

21946749213232 is a deficient number, since it is larger than the sum of its proper divisors (20575077387436).

21946749213232 is a wasteful number, since it uses less digits than its factorization.

21946749213232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371671825835 (or 1371671825829 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 55.

The spelling of 21946749213232 in words is "twenty-one trillion, nine hundred forty-six billion, seven hundred forty-nine million, two hundred thirteen thousand, two hundred thirty-two".