20292091 has 4 divisors (see below), whose sum is σ = 20404384. Its totient is φ = 20179800.

The previous prime is 20292079. The next prime is 20292113. The reversal of 20292091 is 19029202.

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 20292091 - 2¹³ = 20283899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20292061) 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, 55875 + ... + 56236.

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

Almost surely, 2^20292091 is an apocalyptic number.

20292091 is a deficient number, since it is larger than the sum of its proper divisors (112293).

20292091 is a wasteful number, since it uses less digits than its factorization.

20292091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112292.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 20292091 is about 4504.6743500502. The cubic root of 20292091 is about 272.7568086564.

The spelling of 20292091 in words is "twenty million, two hundred ninety-two thousand, ninety-one".