20673029 has 4 divisors (see below), whose sum is σ = 22263276. Its totient is φ = 19082784.

The previous prime is 20673019. The next prime is 20673077. The reversal of 20673029 is 92037602.

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 1444804 + 19228225 = 1202^2 + 4385^2 .

It is a cyclic number.

It is not a de Polignac number, because 20673029 - 2⁴ = 20673013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20672992 and 20673010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795104 + ... + 795129.

It is an arithmetic number, because the mean of its divisors is an integer number (5565819).

Almost surely, 2^20673029 is an apocalyptic number.

It is an amenable number.

20673029 is a deficient number, since it is larger than the sum of its proper divisors (1590247).

20673029 is a wasteful number, since it uses less digits than its factorization.

20673029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590246.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20673029 is about 4546.7602751850. The cubic root of 20673029 is about 274.4530351424.

The spelling of 20673029 in words is "twenty million, six hundred seventy-three thousand, twenty-nine".