20238973 has 2 divisors, whose sum is σ = 20238974. Its totient is φ = 20238972.

The previous prime is 20238937. The next prime is 20238989. The reversal of 20238973 is 37983202.

Together with previous prime (20238937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10517049 + 9721924 = 3243^2 + 3118^2 .

It is a cyclic number.

It is not a de Polignac number, because 20238973 - 2¹³ = 20230781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20238913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10119486 + 10119487.

It is an arithmetic number, because the mean of its divisors is an integer number (10119487).

Almost surely, 2^20238973 is an apocalyptic number.

It is an amenable number.

20238973 is a deficient number, since it is larger than the sum of its proper divisors (1).

20238973 is an equidigital number, since it uses as much as digits as its factorization.

20238973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 20238973 is about 4498.7746109357. The cubic root of 20238973 is about 272.5186049077.

The spelling of 20238973 in words is "twenty million, two hundred thirty-eight thousand, nine hundred seventy-three".