20484091 has 4 divisors (see below), whose sum is σ = 20581384. Its totient is φ = 20386800.

The previous prime is 20484083. The next prime is 20484097. The reversal of 20484091 is 19048402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19048402 = 2 ⋅9524201.

It is a cyclic number.

It is not a de Polignac number, because 20484091 - 2³ = 20484083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20484097) 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, 48330 + ... + 48751.

It is an arithmetic number, because the mean of its divisors is an integer number (5145346).

Almost surely, 2^20484091 is an apocalyptic number.

20484091 is a deficient number, since it is larger than the sum of its proper divisors (97293).

20484091 is an equidigital number, since it uses as much as digits as its factorization.

20484091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97292.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20484091 is about 4525.9353729367. The cubic root of 20484091 is about 273.6143677335.

The spelling of 20484091 in words is "twenty million, four hundred eighty-four thousand, ninety-one".