21273837262 has 16 divisors (see below), whose sum is σ = 31978519200. Its totient is φ = 10614356640.

The previous prime is 21273837259. The next prime is 21273837269. The reversal of 21273837262 is 26273837212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21273837269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1944664 + ... + 1955572.

It is an arithmetic number, because the mean of its divisors is an integer number (1998657450).

Almost surely, 2^21273837262 is an apocalyptic number.

21273837262 is a deficient number, since it is larger than the sum of its proper divisors (10704681938).

21273837262 is a wasteful number, since it uses less digits than its factorization.

21273837262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12891.

The product of its digits is 338688, while the sum is 43.

It can be divided in two parts, 212738 and 37262, that added together give a square (250000 = 500²).

The spelling of 21273837262 in words is "twenty-one billion, two hundred seventy-three million, eight hundred thirty-seven thousand, two hundred sixty-two".