20635061 has 4 divisors (see below), whose sum is σ = 20658624. Its totient is φ = 20611500.

The previous prime is 20635051. The next prime is 20635081. The reversal of 20635061 is 16053602.

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 20635061 - 2⁶ = 20634997 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 (20635031) 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, 10415 + ... + 12236.

It is an arithmetic number, because the mean of its divisors is an integer number (5164656).

Almost surely, 2^20635061 is an apocalyptic number.

It is an amenable number.

20635061 is a deficient number, since it is larger than the sum of its proper divisors (23563).

20635061 is an equidigital number, since it uses as much as digits as its factorization.

20635061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23562.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20635061 is about 4542.5830757401. The cubic root of 20635061 is about 274.2849124041.

Adding to 20635061 its reverse (16053602), we get a palindrome (36688663).

The spelling of 20635061 in words is "twenty million, six hundred thirty-five thousand, sixty-one".