20673901 has 4 divisors (see below), whose sum is σ = 20887132. Its totient is φ = 20460672.

The previous prime is 20673893. The next prime is 20673907. The reversal of 20673901 is 10937602.

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 7344100 + 13329801 = 2710^2 + 3651^2 .

It is a cyclic number.

It is not a de Polignac number, because 20673901 - 2³ = 20673893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20673901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673907) 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, 106470 + ... + 106663.

It is an arithmetic number, because the mean of its divisors is an integer number (5221783).

Almost surely, 2^20673901 is an apocalyptic number.

It is an amenable number.

20673901 is a deficient number, since it is larger than the sum of its proper divisors (213231).

20673901 is an equidigital number, since it uses as much as digits as its factorization.

20673901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213230.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 20673901 is about 4546.8561666277. The cubic root of 20673901 is about 274.4568939493.

The spelling of 20673901 in words is "twenty million, six hundred seventy-three thousand, nine hundred one".