20682001 has 4 divisors (see below), whose sum is σ = 21241012. Its totient is φ = 20122992.

The previous prime is 20681993. The next prime is 20682019. The reversal of 20682001 is 10028602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10028602 = 2 ⋅5014301.

It can be written as a sum of positive squares in 2 ways, for example, as 10086976 + 10595025 = 3176^2 + 3255^2 .

It is a cyclic number.

It is not a de Polignac number, because 20682001 - 2³ = 20681993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20682001.

It is not an unprimeable number, because it can be changed into a prime (20682071) 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, 279450 + ... + 279523.

It is an arithmetic number, because the mean of its divisors is an integer number (5310253).

Almost surely, 2^20682001 is an apocalyptic number.

It is an amenable number.

20682001 is a deficient number, since it is larger than the sum of its proper divisors (559011).

20682001 is an equidigital number, since it uses as much as digits as its factorization.

20682001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559010.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 20682001 is about 4547.7468047375. The cubic root of 20682001 is about 274.4927331872.

The spelling of 20682001 in words is "twenty million, six hundred eighty-two thousand, one".