21481077002643 has 24 divisors (see below), whose sum is σ = 31107225816576. Its totient is φ = 14284269846000.

The previous prime is 21481077002611. The next prime is 21481077002653. The reversal of 21481077002643 is 34620077018412.

21481077002643 is a `hidden beast` number, since 214 + 8 + 107 + 70 + 0 + 264 + 3 = 666.

It is not a de Polignac number, because 21481077002643 - 2⁵ = 21481077002611 is a prime.

It is a super-2 number, since 2×21481077002643² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21481077002653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16643346 + ... + 17887512.

It is an arithmetic number, because the mean of its divisors is an integer number (1296134409024).

Almost surely, 2^{21481077002643} is an apocalyptic number.

21481077002643 is a deficient number, since it is larger than the sum of its proper divisors (9626148813933).

21481077002643 is a wasteful number, since it uses less digits than its factorization.

21481077002643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249055 (or 1249052 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 21481077002643 in words is "twenty-one trillion, four hundred eighty-one billion, seventy-seven million, two thousand, six hundred forty-three".