20994179 has 2 divisors, whose sum is σ = 20994180. Its totient is φ = 20994178.

The previous prime is 20994151. The next prime is 20994209. The reversal of 20994179 is 97149902.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20994179 - 2⁸ = 20993923 is a prime.

It is not a weakly prime, because it can be changed into another prime (20994109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10497089 + 10497090.

It is an arithmetic number, because the mean of its divisors is an integer number (10497090).

Almost surely, 2^20994179 is an apocalyptic number.

20994179 is a deficient number, since it is larger than the sum of its proper divisors (1).

20994179 is an equidigital number, since it uses as much as digits as its factorization.

20994179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 20994179 is about 4581.9405277677. The cubic root of 20994179 is about 275.8669236989.

The spelling of 20994179 in words is "twenty million, nine hundred ninety-four thousand, one hundred seventy-nine".