21261353627486 has 16 divisors (see below), whose sum is σ = 36450164547936. Its totient is φ = 9111476258016.

The previous prime is 21261353627483. The next prime is 21261353627617. The reversal of 21261353627486 is 68472635316212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21261353627483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44121761 + ... + 44601036.

It is an arithmetic number, because the mean of its divisors is an integer number (2278135284246).

Almost surely, 2^{21261353627486} is an apocalyptic number.

21261353627486 is a deficient number, since it is larger than the sum of its proper divisors (15188810920450).

21261353627486 is a wasteful number, since it uses less digits than its factorization.

21261353627486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88739923.

The product of its digits is 17418240, while the sum is 56.

The spelling of 21261353627486 in words is "twenty-one trillion, two hundred sixty-one billion, three hundred fifty-three million, six hundred twenty-seven thousand, four hundred eighty-six".