20242973 has 4 divisors (see below), whose sum is σ = 20520348. Its totient is φ = 19965600.

The previous prime is 20242951. The next prime is 20242993. The reversal of 20242973 is 37924202.

It is a happy number.

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 17081689 + 3161284 = 4133^2 + 1778^2 .

It is a cyclic number.

It is not a de Polignac number, because 20242973 - 2¹⁴ = 20226589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20242993) 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, 138578 + ... + 138723.

It is an arithmetic number, because the mean of its divisors is an integer number (5130087).

Almost surely, 2^20242973 is an apocalyptic number.

It is an amenable number.

20242973 is a deficient number, since it is larger than the sum of its proper divisors (277375).

20242973 is an equidigital number, since it uses as much as digits as its factorization.

20242973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277374.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20242973 is about 4499.2191544756. The cubic root of 20242973 is about 272.5365571133.

The spelling of 20242973 in words is "twenty million, two hundred forty-two thousand, nine hundred seventy-three".