21096862641 has 32 divisors (see below), whose sum is σ = 31437056000. Its totient is φ = 13982628240.

The previous prime is 21096862603. The next prime is 21096862663. The reversal of 21096862641 is 14626869012.

21096862641 is a `hidden beast` number, since 2 + 10 + 9 + 6 + 8 + 626 + 4 + 1 = 666.

It is not a de Polignac number, because 21096862641 - 2¹⁷ = 21096731569 is a prime.

It is a super-2 number, since 2×21096862641² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21096869641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7968780 + ... + 7971426.

It is an arithmetic number, because the mean of its divisors is an integer number (982408000).

Almost surely, 2^21096862641 is an apocalyptic number.

It is an amenable number.

21096862641 is a deficient number, since it is larger than the sum of its proper divisors (10340193359).

21096862641 is a wasteful number, since it uses less digits than its factorization.

21096862641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266 (or 4260 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 21096862641 in words is "twenty-one billion, ninety-six million, eight hundred sixty-two thousand, six hundred forty-one".