20210973 has 4 divisors (see below), whose sum is σ = 26947968. Its totient is φ = 13473980.

The previous prime is 20210963. The next prime is 20211001. The reversal of 20210973 is 37901202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20210973 - 2⁸ = 20210717 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210923) 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, 3368493 + ... + 3368498.

It is an arithmetic number, because the mean of its divisors is an integer number (6736992).

Almost surely, 2^20210973 is an apocalyptic number.

It is an amenable number.

20210973 is a deficient number, since it is larger than the sum of its proper divisors (6736995).

20210973 is an equidigital number, since it uses as much as digits as its factorization.

20210973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6736994.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 20210973 is about 4495.6615753413. The cubic root of 20210973 is about 272.3928731901.

It can be divided in two parts, 202 and 10973, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 20210973 in words is "twenty million, two hundred ten thousand, nine hundred seventy-three".