21375226869 has 8 divisors (see below), whose sum is σ = 28500979680. Its totient is φ = 14249812656.

The previous prime is 21375226861. The next prime is 21375226907. The reversal of 21375226869 is 96862257312.

It is a happy number.

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

It is not a de Polignac number, because 21375226869 - 2³ = 21375226861 is a prime.

It is a super-2 number, since 2×21375226869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21375226861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189427 + ... + 280415.

It is an arithmetic number, because the mean of its divisors is an integer number (3562622460).

Almost surely, 2^21375226869 is an apocalyptic number.

It is an amenable number.

21375226869 is a deficient number, since it is larger than the sum of its proper divisors (7125752811).

21375226869 is an equidigital number, since it uses as much as digits as its factorization.

21375226869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169299.

The product of its digits is 2177280, while the sum is 51.

The spelling of 21375226869 in words is "twenty-one billion, three hundred seventy-five million, two hundred twenty-six thousand, eight hundred sixty-nine".