1673545220 has 12 divisors (see below), whose sum is σ = 3514445004. Its totient is φ = 669418080.

The previous prime is 1673545219. The next prime is 1673545249. The reversal of 1673545220 is 225453761.

It can be written as a sum of positive squares in 2 ways, for example, as 528264256 + 1145280964 = 22984^2 + 33842^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41838611 + ... + 41838650.

It is an arithmetic number, because the mean of its divisors is an integer number (292870417).

Almost surely, 2^1673545220 is an apocalyptic number.

1673545220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1673545220 is an abundant number, since it is smaller than the sum of its proper divisors (1840899784).

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

1673545220 is a wasteful number, since it uses less digits than its factorization.

1673545220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83677270 (or 83677268 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 1673545220 is about 40908.9870321913. The cubic root of 1673545220 is about 1187.2599480790.

Adding to 1673545220 its reverse (225453761), we get a palindrome (1898998981).

The spelling of 1673545220 in words is "one billion, six hundred seventy-three million, five hundred forty-five thousand, two hundred twenty".