21262362008 has 16 divisors (see below), whose sum is σ = 39878660880. Its totient is φ = 10628052448.

The previous prime is 21262361999. The next prime is 21262362041. The reversal of 21262362008 is 80026326212.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 362060 + ... + 416667.

It is an arithmetic number, because the mean of its divisors is an integer number (2492416305).

Almost surely, 2^21262362008 is an apocalyptic number.

It is an amenable number.

21262362008 is a deficient number, since it is larger than the sum of its proper divisors (18616298872).

21262362008 is a wasteful number, since it uses less digits than its factorization.

21262362008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782146 (or 782142 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 21262362008 in words is "twenty-one billion, two hundred sixty-two million, three hundred sixty-two thousand, eight".