20632901 has 4 divisors (see below), whose sum is σ = 20645100. Its totient is φ = 20620704.

The previous prime is 20632889. The next prime is 20632919. The reversal of 20632901 is 10923602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10923602 = 2 ⋅5461801.

It can be written as a sum of positive squares in 2 ways, for example, as 20016676 + 616225 = 4474^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 20632901 - 2¹⁴ = 20616517 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 (20632921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3056 + ... + 7113.

It is an arithmetic number, because the mean of its divisors is an integer number (5161275).

Almost surely, 2^20632901 is an apocalyptic number.

It is an amenable number.

20632901 is a deficient number, since it is larger than the sum of its proper divisors (12199).

20632901 is a wasteful number, since it uses less digits than its factorization.

20632901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12198.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 20632901 is about 4542.3453193257. The cubic root of 20632901 is about 274.2753417017.

The spelling of 20632901 in words is "twenty million, six hundred thirty-two thousand, nine hundred one".