21423537826888 has 16 divisors (see below), whose sum is σ = 42532023627180. Its totient is φ = 10081664859648.

The previous prime is 21423537826883. The next prime is 21423537826907. The reversal of 21423537826888 is 88862873532412.

It can be written as a sum of positive squares in 2 ways, for example, as 21029176434564 + 394361392324 = 4585758^2 + 627982^2 .

It is not an unprimeable number, because it can be changed into a prime (21423537826883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78763006581 + ... + 78763006852.

Almost surely, 2^{21423537826888} is an apocalyptic number.

It is an amenable number.

21423537826888 is a deficient number, since it is larger than the sum of its proper divisors (21108485800292).

21423537826888 is a wasteful number, since it uses less digits than its factorization.

21423537826888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157526013456 (or 157526013452 counting only the distinct ones).

The product of its digits is 247726080, while the sum is 67.

The spelling of 21423537826888 in words is "twenty-one trillion, four hundred twenty-three billion, five hundred thirty-seven million, eight hundred twenty-six thousand, eight hundred eighty-eight".