20000501 has 4 divisors (see below), whose sum is σ = 20870112. Its totient is φ = 19130892.

The previous prime is 20000471. The next prime is 20000503. The reversal of 20000501 is 10500002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20000501 - 2¹⁴ = 19984117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434771 + ... + 434816.

It is an arithmetic number, because the mean of its divisors is an integer number (5217528).

Almost surely, 2^20000501 is an apocalyptic number.

It is an amenable number.

20000501 is a deficient number, since it is larger than the sum of its proper divisors (869611).

20000501 is an equidigital number, since it uses as much as digits as its factorization.

20000501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869610.

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 20000501 is about 4472.1919681516. The cubic root of 20000501 is about 271.4440281793. Note that the first 3 decimals are identical.

Adding to 20000501 its reverse (10500002), we get a palindrome (30500503).

The spelling of 20000501 in words is "twenty million, five hundred one", and thus it is an aban number.