20196079 has 4 divisors (see below), whose sum is σ = 20404384. Its totient is φ = 19987776.

The previous prime is 20196049. The next prime is 20196083. The reversal of 20196079 is 97069102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20196079 - 2¹³ = 20187887 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 (20196049) 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, 104007 + ... + 104200.

It is an arithmetic number, because the mean of its divisors is an integer number (5101096).

Almost surely, 2^20196079 is an apocalyptic number.

20196079 is a deficient number, since it is larger than the sum of its proper divisors (208305).

20196079 is an equidigital number, since it uses as much as digits as its factorization.

20196079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208304.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 20196079 is about 4494.0047841541. The cubic root of 20196079 is about 272.3259455788.

Multiplying 20196079 by its sum of digits (34), we get a palindrome (686666686).

The spelling of 20196079 in words is "twenty million, one hundred ninety-six thousand, seventy-nine".