26821031868473 has 8 divisors (see below), whose sum is σ = 28398790033128. Its totient is φ = 25243279304704.

The previous prime is 26821031868469. The next prime is 26821031868479. The reversal of 26821031868473 is 37486813012862.

It can be written as a sum of positive squares in 4 ways, for example, as 10989967572544 + 15831064295929 = 3315112^2 + 3978827^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26821031868473 - 2² = 26821031868469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26821031868479) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12274865 + ... + 14293857.

It is an arithmetic number, because the mean of its divisors is an integer number (3549848754141).

Almost surely, 2^{26821031868473} is an apocalyptic number.

It is an amenable number.

26821031868473 is a deficient number, since it is larger than the sum of its proper divisors (1577758164655).

26821031868473 is a wasteful number, since it uses less digits than its factorization.

26821031868473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800443.

The product of its (nonzero) digits is 18579456, while the sum is 59.

The spelling of 26821031868473 in words is "twenty-six trillion, eight hundred twenty-one billion, thirty-one million, eight hundred sixty-eight thousand, four hundred seventy-three".