20194899 has 4 divisors (see below), whose sum is σ = 26926536. Its totient is φ = 13463264.

The previous prime is 20194879. The next prime is 20194903. The reversal of 20194899 is 99849102.

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 20194899 - 2⁷ = 20194771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20194899.

It is not an unprimeable number, because it can be changed into a prime (20194879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3365814 + ... + 3365819.

It is an arithmetic number, because the mean of its divisors is an integer number (6731634).

Almost surely, 2^20194899 is an apocalyptic number.

20194899 is a deficient number, since it is larger than the sum of its proper divisors (6731637).

20194899 is an equidigital number, since it uses as much as digits as its factorization.

20194899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6731636.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 20194899 is about 4493.8734962168. The cubic root of 20194899 is about 272.3206417296.

The spelling of 20194899 in words is "twenty million, one hundred ninety-four thousand, eight hundred ninety-nine".