16123846021 has 2 divisors, whose sum is σ = 16123846022. Its totient is φ = 16123846020.

The previous prime is 16123845989. The next prime is 16123846069. The reversal of 16123846021 is 12064832161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8469520900 + 7654325121 = 92030^2 + 87489^2 .

It is a cyclic number.

It is not a de Polignac number, because 16123846021 - 2⁵ = 16123845989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16129846021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8061923010 + 8061923011.

It is an arithmetic number, because the mean of its divisors is an integer number (8061923011).

Almost surely, 2^16123846021 is an apocalyptic number.

It is an amenable number.

16123846021 is a deficient number, since it is larger than the sum of its proper divisors (1).

16123846021 is an equidigital number, since it uses as much as digits as its factorization.

16123846021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 16123846021 in words is "sixteen billion, one hundred twenty-three million, eight hundred forty-six thousand, twenty-one".