20162501 has 2 divisors, whose sum is σ = 20162502. Its totient is φ = 20162500.

The previous prime is 20162489. The next prime is 20162503. The reversal of 20162501 is 10526102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20160100 + 2401 = 4490^2 + 49^2 .

It is a cyclic number.

It is not a de Polignac number, because 20162501 - 2⁶ = 20162437 is a prime.

Together with 20162503, 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 20162501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20162503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10081250 + 10081251.

It is an arithmetic number, because the mean of its divisors is an integer number (10081251).

Almost surely, 2^20162501 is an apocalyptic number.

It is an amenable number.

20162501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20162501 is an equidigital number, since it uses as much as digits as its factorization.

20162501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 20162501 is about 4490.2673639773. The cubic root of 20162501 is about 272.1749388251.

Adding to 20162501 its reverse (10526102), we get a palindrome (30688603).

The spelling of 20162501 in words is "twenty million, one hundred sixty-two thousand, five hundred one".