16221560923 has 2 divisors, whose sum is σ = 16221560924. Its totient is φ = 16221560922.

The previous prime is 16221560909. The next prime is 16221560951. The reversal of 16221560923 is 32906512261.

16221560923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16221560923 - 2²⁹ = 15684690011 is a prime.

It is a super-2 number, since 2×16221560923² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16221563923) 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 as a sum of consecutive naturals, namely, 8110780461 + 8110780462.

It is an arithmetic number, because the mean of its divisors is an integer number (8110780462).

Almost surely, 2^16221560923 is an apocalyptic number.

16221560923 is a deficient number, since it is larger than the sum of its proper divisors (1).

16221560923 is an equidigital number, since it uses as much as digits as its factorization.

16221560923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 16221560923 in words is "sixteen billion, two hundred twenty-one million, five hundred sixty thousand, nine hundred twenty-three".