20635079 has 4 divisors (see below), whose sum is σ = 20660976. Its totient is φ = 20609184.

The previous prime is 20635051. The next prime is 20635081. The reversal of 20635079 is 97053602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97053602 = 2 ⋅48526801.

It is a cyclic number.

It is not a de Polignac number, because 20635079 - 2¹⁶ = 20569543 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 (20635009) 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, 11714 + ... + 13359.

It is an arithmetic number, because the mean of its divisors is an integer number (5165244).

Almost surely, 2^20635079 is an apocalyptic number.

20635079 is a deficient number, since it is larger than the sum of its proper divisors (25897).

20635079 is an equidigital number, since it uses as much as digits as its factorization.

20635079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25896.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 20635079 is about 4542.5850569912. The cubic root of 20635079 is about 274.2849921572.

The spelling of 20635079 in words is "twenty million, six hundred thirty-five thousand, seventy-nine".