21234352019 has 2 divisors, whose sum is σ = 21234352020. Its totient is φ = 21234352018.

The previous prime is 21234351967. The next prime is 21234352039. The reversal of 21234352019 is 91025343212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21234352019 is a prime.

It is a super-2 number, since 2×21234352019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21234352039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617176009 + 10617176010.

It is an arithmetic number, because the mean of its divisors is an integer number (10617176010).

Almost surely, 2^21234352019 is an apocalyptic number.

21234352019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21234352019 is an equidigital number, since it uses as much as digits as its factorization.

21234352019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 21234352019 in words is "twenty-one billion, two hundred thirty-four million, three hundred fifty-two thousand, nineteen".