21088845896 has 32 divisors (see below), whose sum is σ = 40636556280. Its totient is φ = 10252800000.

The previous prime is 21088845887. The next prime is 21088845913. The reversal of 21088845896 is 69854888012.

It can be written as a sum of positive squares in 4 ways, for example, as 19726202500 + 1362643396 = 140450^2 + 36914^2 .

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, 451646 + ... + 496146.

Almost surely, 2^21088845896 is an apocalyptic number.

It is an amenable number.

21088845896 is a deficient number, since it is larger than the sum of its proper divisors (19547710384).

21088845896 is a wasteful number, since it uses less digits than its factorization.

21088845896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46145 (or 46141 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 59.

The spelling of 21088845896 in words is "twenty-one billion, eighty-eight million, eight hundred forty-five thousand, eight hundred ninety-six".