20197379 has 4 divisors (see below), whose sum is σ = 20690040. Its totient is φ = 19704720.

The previous prime is 20197349. The next prime is 20197391. The reversal of 20197379 is 97379102.

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 20197379 - 2⁸ = 20197123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20197319) 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, 246269 + ... + 246350.

It is an arithmetic number, because the mean of its divisors is an integer number (5172510).

Almost surely, 2^20197379 is an apocalyptic number.

20197379 is a deficient number, since it is larger than the sum of its proper divisors (492661).

20197379 is an equidigital number, since it uses as much as digits as its factorization.

20197379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492660.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 20197379 is about 4494.1494189668. The cubic root of 20197379 is about 272.3317885634.

The spelling of 20197379 in words is "twenty million, one hundred ninety-seven thousand, three hundred seventy-nine".