21367324019 has 32 divisors (see below), whose sum is σ = 23053973760. Its totient is φ = 19745510400.

The previous prime is 21367324009. The next prime is 21367324049. The reversal of 21367324019 is 91042376312.

It is a cyclic number.

It is not a de Polignac number, because 21367324019 - 2⁴ = 21367324003 is a prime.

It is a super-2 number, since 2×21367324019² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21367324009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64553684 + ... + 64554014.

It is an arithmetic number, because the mean of its divisors is an integer number (720436680).

Almost surely, 2^21367324019 is an apocalyptic number.

21367324019 is a deficient number, since it is larger than the sum of its proper divisors (1686649741).

21367324019 is a wasteful number, since it uses less digits than its factorization.

21367324019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 21367324019 in words is "twenty-one billion, three hundred sixty-seven million, three hundred twenty-four thousand, nineteen".