21829767019 has 2 divisors, whose sum is σ = 21829767020. Its totient is φ = 21829767018.

The previous prime is 21829766999. The next prime is 21829767049. The reversal of 21829767019 is 91076792812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21829767019 - 2⁹ = 21829766507 is a prime.

It is a super-2 number, since 2×21829767019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21829767049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10914883509 + 10914883510.

It is an arithmetic number, because the mean of its divisors is an integer number (10914883510).

Almost surely, 2^21829767019 is an apocalyptic number.

21829767019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21829767019 is an equidigital number, since it uses as much as digits as its factorization.

21829767019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 52.

The spelling of 21829767019 in words is "twenty-one billion, eight hundred twenty-nine million, seven hundred sixty-seven thousand, nineteen".