20284501 has 2 divisors, whose sum is σ = 20284502. Its totient is φ = 20284500.

The previous prime is 20284471. The next prime is 20284529. The reversal of 20284501 is 10548202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19980900 + 303601 = 4470^2 + 551^2 .

It is a cyclic number.

It is not a de Polignac number, because 20284501 - 2⁵ = 20284469 is a prime.

It is a super-2 number, since 2×20284501² = 822921961638002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20284541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10142250 + 10142251.

It is an arithmetic number, because the mean of its divisors is an integer number (10142251).

Almost surely, 2^20284501 is an apocalyptic number.

It is an amenable number.

20284501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20284501 is an equidigital number, since it uses as much as digits as its factorization.

20284501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20284501 is about 4503.8318130232. The cubic root of 20284501 is about 272.7227973373.

The spelling of 20284501 in words is "twenty million, two hundred eighty-four thousand, five hundred one".