26642234021 has 8 divisors (see below), whose sum is σ = 29302097664. Its totient is φ = 24069579120.

The previous prime is 26642233999. The next prime is 26642234041. The reversal of 26642234021 is 12043224662.

It is a happy number.

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 26642234021 - 2¹⁸ = 26641971877 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 (26642234041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21801545 + ... + 21802766.

It is an arithmetic number, because the mean of its divisors is an integer number (3662762208).

Almost surely, 2^26642234021 is an apocalyptic number.

It is an amenable number.

26642234021 is a deficient number, since it is larger than the sum of its proper divisors (2659863643).

26642234021 is a wasteful number, since it uses less digits than its factorization.

26642234021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43604371.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 26642234021 its reverse (12043224662), we get a palindrome (38685458683).

The spelling of 26642234021 in words is "twenty-six billion, six hundred forty-two million, two hundred thirty-four thousand, twenty-one".