20201501 has 2 divisors, whose sum is σ = 20201502. Its totient is φ = 20201500.

The previous prime is 20201483. The next prime is 20201507. The reversal of 20201501 is 10510202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19096900 + 1104601 = 4370^2 + 1051^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201501 - 2⁶ = 20201437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100750 + 10100751.

It is an arithmetic number, because the mean of its divisors is an integer number (10100751).

Almost surely, 2^20201501 is an apocalyptic number.

It is an amenable number.

20201501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201501 is an equidigital number, since it uses as much as digits as its factorization.

20201501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 20201501 is about 4494.6079918053. The cubic root of 20201501 is about 272.3503136614.

Adding to 20201501 its reverse (10510202), we get a palindrome (30711703).

It can be divided in two parts, 20201 and 501, that added together give a palindrome (20702).

The spelling of 20201501 in words is "twenty million, two hundred one thousand, five hundred one".