20302673 has 4 divisors (see below), whose sum is σ = 20315748. Its totient is φ = 20289600.

The previous prime is 20302649. The next prime is 20302693. The reversal of 20302673 is 37620302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3794704 + 16507969 = 1948^2 + 4063^2 .

It is a cyclic number.

It is not a de Polignac number, because 20302673 - 2⁶ = 20302609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20302643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3836 + ... + 7437.

It is an arithmetic number, because the mean of its divisors is an integer number (5078937).

Almost surely, 2^20302673 is an apocalyptic number.

It is an amenable number.

20302673 is a deficient number, since it is larger than the sum of its proper divisors (13075).

20302673 is a wasteful number, since it uses less digits than its factorization.

20302673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13074.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 20302673 is about 4505.8487546743. The cubic root of 20302673 is about 272.8042131842.

Adding to 20302673 its reverse (37620302), we get a palindrome (57922975).

It can be divided in two parts, 20 and 302673, that multiplied together give a triangular number (6053460 = T₃₄₇₉).

The spelling of 20302673 in words is "twenty million, three hundred two thousand, six hundred seventy-three".