21088838673 has 80 divisors (see below), whose sum is σ = 36773003520. Its totient is φ = 11795756544.

The previous prime is 21088838653. The next prime is 21088838677. The reversal of 21088838673 is 37683888012.

It is not a de Polignac number, because 21088838673 - 2¹⁴ = 21088822289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21088838677) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5668708 + ... + 5672426.

It is an arithmetic number, because the mean of its divisors is an integer number (459662544).

Almost surely, 2^21088838673 is an apocalyptic number.

It is an amenable number.

21088838673 is a deficient number, since it is larger than the sum of its proper divisors (15684164847).

21088838673 is a wasteful number, since it uses less digits than its factorization.

21088838673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948 (or 3939 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 21088838673 in words is "twenty-one billion, eighty-eight million, eight hundred thirty-eight thousand, six hundred seventy-three".