21038000219 has 2 divisors, whose sum is σ = 21038000220. Its totient is φ = 21038000218.

The previous prime is 21038000197. The next prime is 21038000227. The reversal of 21038000219 is 91200083012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21038000219 - 2¹² = 21037996123 is a prime.

It is a super-2 number, since 2×21038000219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21038000299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10519000109 + 10519000110.

It is an arithmetic number, because the mean of its divisors is an integer number (10519000110).

Almost surely, 2^21038000219 is an apocalyptic number.

21038000219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21038000219 is an equidigital number, since it uses as much as digits as its factorization.

21038000219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 21038000219 in words is "twenty-one billion, thirty-eight million, two hundred nineteen", and thus it is an aban number.