26842108221 has 24 divisors (see below), whose sum is σ = 39423858656. Its totient is φ = 17594094240.

The previous prime is 26842108219. The next prime is 26842108243. The reversal of 26842108221 is 12280124862.

26842108221 is a `hidden beast` number, since 2 + 6 + 8 + 421 + 0 + 8 + 221 = 666.

It is not a de Polignac number, because 26842108221 - 2¹ = 26842108219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26842108211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1530126 + ... + 1547568.

Almost surely, 2^26842108221 is an apocalyptic number.

It is an amenable number.

26842108221 is a deficient number, since it is larger than the sum of its proper divisors (12581750435).

26842108221 is a wasteful number, since it uses less digits than its factorization.

26842108221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20313 (or 20310 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The spelling of 26842108221 in words is "twenty-six billion, eight hundred forty-two million, one hundred eight thousand, two hundred twenty-one".