20962001 has 4 divisors (see below), whose sum is σ = 20978100. Its totient is φ = 20945904.

The previous prime is 20961961. The next prime is 20962013. The reversal of 20962001 is 10026902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10026902 = 2 ⋅5013451.

It can be written as a sum of positive squares in 2 ways, for example, as 6635776 + 14326225 = 2576^2 + 3785^2 .

It is a cyclic number.

It is not a de Polignac number, because 20962001 - 2⁶ = 20961937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20962031) 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, 5906 + ... + 8763.

It is an arithmetic number, because the mean of its divisors is an integer number (5244525).

Almost surely, 2^20962001 is an apocalyptic number.

It is an amenable number.

20962001 is a deficient number, since it is larger than the sum of its proper divisors (16099).

20962001 is a wasteful number, since it uses less digits than its factorization.

20962001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16098.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 20962001 is about 4578.4277869155. The cubic root of 20962001 is about 275.7259102470.

Adding to 20962001 its reverse (10026902), we get a palindrome (30988903).

The spelling of 20962001 in words is "twenty million, nine hundred sixty-two thousand, one".