20252501 has 2 divisors, whose sum is σ = 20252502. Its totient is φ = 20252500.

The previous prime is 20252497. The next prime is 20252503. The reversal of 20252501 is 10525202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10956100 + 9296401 = 3310^2 + 3049^2 .

It is a cyclic number.

It is not a de Polignac number, because 20252501 - 2² = 20252497 is a prime.

It is a super-3 number, since 3×20252501³ (a number of 23 digits) contains 333 as substring.

Together with 20252503, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20252501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20252503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10126250 + 10126251.

It is an arithmetic number, because the mean of its divisors is an integer number (10126251).

Almost surely, 2^20252501 is an apocalyptic number.

It is an amenable number.

20252501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20252501 is an equidigital number, since it uses as much as digits as its factorization.

20252501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20252501 is about 4500.2778803092. The cubic root of 20252501 is about 272.5793097434.

Adding to 20252501 its reverse (10525202), we get a palindrome (30777703).

The spelling of 20252501 in words is "twenty million, two hundred fifty-two thousand, five hundred one".