20192091 has 16 divisors (see below), whose sum is σ = 29064960. Its totient is φ = 12430880.

The previous prime is 20192087. The next prime is 20192119. The reversal of 20192091 is 19029102.

It is a cyclic number.

It is not a de Polignac number, because 20192091 - 2² = 20192087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20192071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3045 + ... + 7046.

It is an arithmetic number, because the mean of its divisors is an integer number (1816560).

Almost surely, 2^20192091 is an apocalyptic number.

20192091 is a deficient number, since it is larger than the sum of its proper divisors (8872869).

20192091 is a wasteful number, since it uses less digits than its factorization.

20192091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10146.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 20192091 is about 4493.5610600058. The cubic root of 20192091 is about 272.3080195355.

The spelling of 20192091 in words is "twenty million, one hundred ninety-two thousand, ninety-one".