1020305673 has 16 divisors (see below), whose sum is σ = 1552418560. Its totient is φ = 661819248.

The previous prime is 1020305659. The next prime is 1020305707. The reversal of 1020305673 is 3765030201.

It is a happy number.

It is not a de Polignac number, because 1020305673 - 2⁸ = 1020305417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020305633) 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, 509665 + ... + 511662.

It is an arithmetic number, because the mean of its divisors is an integer number (97026160).

Almost surely, 2^1020305673 is an apocalyptic number.

It is an amenable number.

1020305673 is a deficient number, since it is larger than the sum of its proper divisors (532112887).

1020305673 is a wasteful number, since it uses less digits than its factorization.

1020305673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021373 (or 1021367 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 1020305673 is about 31942.2239833109. The cubic root of 1020305673 is about 1006.7232542176.

Adding to 1020305673 its reverse (3765030201), we get a palindrome (4785335874).

The spelling of 1020305673 in words is "one billion, twenty million, three hundred five thousand, six hundred seventy-three".