16204545 has 36 divisors (see below), whose sum is σ = 32678100. Its totient is φ = 7406784.

The previous prime is 16204523. The next prime is 16204561. The reversal of 16204545 is 54540261.

It can be written as a sum of positive squares in 2 ways, for example, as 8520561 + 7683984 = 2919^2 + 2772^2 .

It is not a de Polignac number, because 16204545 - 2¹⁹ = 15680257 is a prime.

16204545 is a modest number, since divided by 4545 gives 1620 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1470 + ... + 5879.

It is an arithmetic number, because the mean of its divisors is an integer number (907725).

Almost surely, 2^16204545 is an apocalyptic number.

16204545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16204545 is an abundant number, since it is smaller than the sum of its proper divisors (16473555).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16204545 is a wasteful number, since it uses less digits than its factorization.

16204545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7374 (or 7364 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 16204545 is about 4025.4869270686. The cubic root of 16204545 is about 253.0534603499.

The spelling of 16204545 in words is "sixteen million, two hundred four thousand, five hundred forty-five".