21262819330 has 16 divisors (see below), whose sum is σ = 38277078840. Its totient is φ = 8504237952.

The previous prime is 21262819327. The next prime is 21262819351. The reversal of 21262819330 is 3391826212.

It can be written as a sum of positive squares in 4 ways, for example, as 21262597489 + 221841 = 145817^2 + 471^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21262819330.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6129 + ... + 206308.

Almost surely, 2^21262819330 is an apocalyptic number.

21262819330 is a deficient number, since it is larger than the sum of its proper divisors (17014259510).

21262819330 is a wasteful number, since it uses less digits than its factorization.

21262819330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222453.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 21262819330 in words is "twenty-one billion, two hundred sixty-two million, eight hundred nineteen thousand, three hundred thirty".