20533001 has 2 divisors, whose sum is σ = 20533002. Its totient is φ = 20533000.

The previous prime is 20532971. The next prime is 20533049. The reversal of 20533001 is 10033502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18696976 + 1836025 = 4324^2 + 1355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20533001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20535001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10266500 + 10266501.

It is an arithmetic number, because the mean of its divisors is an integer number (10266501).

Almost surely, 2^20533001 is an apocalyptic number.

It is an amenable number.

20533001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20533001 is an equidigital number, since it uses as much as digits as its factorization.

20533001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 20533001 is about 4531.3354543666. The cubic root of 20533001 is about 273.8319649197.

Adding to 20533001 its reverse (10033502), we get a palindrome (30566503).

The spelling of 20533001 in words is "twenty million, five hundred thirty-three thousand, one".