21073775841 has 24 divisors (see below), whose sum is σ = 32247072000. Its totient is φ = 13215954816.

The previous prime is 21073775831. The next prime is 21073775869. The reversal of 21073775841 is 14857737012.

It is not a de Polignac number, because 21073775841 - 2⁶ = 21073775777 is a prime.

It is a super-3 number, since 3×21073775841³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21073775831) 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, 271396 + ... + 340298.

It is an arithmetic number, because the mean of its divisors is an integer number (1343628000).

Almost surely, 2^21073775841 is an apocalyptic number.

It is an amenable number.

21073775841 is a deficient number, since it is larger than the sum of its proper divisors (11173296159).

21073775841 is a wasteful number, since it uses less digits than its factorization.

21073775841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70925 (or 70922 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The spelling of 21073775841 in words is "twenty-one billion, seventy-three million, seven hundred seventy-five thousand, eight hundred forty-one".