21026262762650 has 12 divisors (see below), whose sum is σ = 39108848738622. Its totient is φ = 8410505105040.

The previous prime is 21026262762607. The next prime is 21026262762667. The reversal of 21026262762650 is 5626726262012.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 19254640536121 + 1771622226529 = 4388011^2 + 1331023^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21026262762595 and 21026262762604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210262627577 + ... + 210262627676.

Almost surely, 2^{21026262762650} is an apocalyptic number.

21026262762650 is a deficient number, since it is larger than the sum of its proper divisors (18082585975972).

21026262762650 is a wasteful number, since it uses less digits than its factorization.

21026262762650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420525255265 (or 420525255260 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 21026262762650 in words is "twenty-one trillion, twenty-six billion, two hundred sixty-two million, seven hundred sixty-two thousand, six hundred fifty".