21226273619 has 2 divisors, whose sum is σ = 21226273620. Its totient is φ = 21226273618.

The previous prime is 21226273609. The next prime is 21226273633. The reversal of 21226273619 is 91637262212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21226273619 - 2¹² = 21226269523 is a prime.

It is a super-2 number, since 2×21226273619² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21226273609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10613136809 + 10613136810.

It is an arithmetic number, because the mean of its divisors is an integer number (10613136810).

Almost surely, 2^21226273619 is an apocalyptic number.

21226273619 is a deficient number, since it is larger than the sum of its proper divisors (1).

21226273619 is an equidigital number, since it uses as much as digits as its factorization.

21226273619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The spelling of 21226273619 in words is "twenty-one billion, two hundred twenty-six million, two hundred seventy-three thousand, six hundred nineteen".