21026691219 has 8 divisors (see below), whose sum is σ = 28564561872. Its totient is φ = 13753307360.

The previous prime is 21026691211. The next prime is 21026691233. The reversal of 21026691219 is 91219662012.

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 21026691219 - 2³ = 21026691211 is a prime.

It is a super-2 number, since 2×21026691219² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21026691211) 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, 66121512 + ... + 66121829.

It is an arithmetic number, because the mean of its divisors is an integer number (3570570234).

Almost surely, 2^21026691219 is an apocalyptic number.

21026691219 is a deficient number, since it is larger than the sum of its proper divisors (7537870653).

21026691219 is a wasteful number, since it uses less digits than its factorization.

21026691219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132243397.

The product of its (nonzero) digits is 23328, while the sum is 39.

The spelling of 21026691219 in words is "twenty-one billion, twenty-six million, six hundred ninety-one thousand, two hundred nineteen".