21088450268 has 24 divisors (see below), whose sum is σ = 37770285168. Its totient is φ = 10297034496.

The previous prime is 21088450267. The next prime is 21088450301. The reversal of 21088450268 is 86205488012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21088450267) 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, 1332530 + ... + 1348262.

It is an arithmetic number, because the mean of its divisors is an integer number (1573761882).

Almost surely, 2^21088450268 is an apocalyptic number.

It is an amenable number.

21088450268 is a deficient number, since it is larger than the sum of its proper divisors (16681834900).

21088450268 is a wasteful number, since it uses less digits than its factorization.

21088450268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23573 (or 23571 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 44.

The spelling of 21088450268 in words is "twenty-one billion, eighty-eight million, four hundred fifty thousand, two hundred sixty-eight".