20023001 has 2 divisors, whose sum is σ = 20023002.
Its totient is φ = 20023000.
The previous prime is 20022971. The next prime is 20023009. The reversal of 20023001 is 10032002.
It is an a-pointer prime, because the next prime (20023009) can be obtained adding 20023001 to its sum of digits (8).
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 19811401 + 211600 = 4451^2 + 460^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-20023001 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 20023001.
It is not a weakly prime, because it can be changed into another prime (20023009) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011500 + 10011501.
It is an arithmetic number, because the mean of its divisors is an integer number (10011501).
Almost surely, 220023001 is an apocalyptic number.
It is an amenable number.
20023001 is a deficient number, since it is larger than the sum of its proper divisors (1).
20023001 is an equidigital number, since it uses as much as digits as its factorization.
20023001 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 12, while the sum is 8.
The square root of 20023001 is about 4474.7068060377.
The cubic root of 20023001 is about 271.5457789940.
Adding to 20023001 its reverse (10032002), we get a palindrome (30055003).
Subtracting from 20023001 its reverse (10032002), we obtain a palindrome (9990999).
The spelling of 20023001 in words is "twenty million, twenty-three thousand, one".