16305495021 has 16 divisors (see below), whose sum is σ = 24989265600. Its totient is φ = 10495490544.

The previous prime is 16305495007. The next prime is 16305495043. The reversal of 16305495021 is 12059450361.

16305495021 is a `hidden beast` number, since 1 + 63 + 0 + 549 + 50 + 2 + 1 = 666.

It is not a de Polignac number, because 16305495021 - 2⁹ = 16305494509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16305495071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10411411 + ... + 10412976.

It is an arithmetic number, because the mean of its divisors is an integer number (1561829100).

Almost surely, 2^16305495021 is an apocalyptic number.

It is an amenable number.

16305495021 is a deficient number, since it is larger than the sum of its proper divisors (8683770579).

16305495021 is a wasteful number, since it uses less digits than its factorization.

16305495021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20824425 (or 20824419 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 16305495021 in words is "sixteen billion, three hundred five million, four hundred ninety-five thousand, twenty-one".