20252091 has 8 divisors (see below), whose sum is σ = 27250960. Its totient is φ = 13377312.

The previous prime is 20252077. The next prime is 20252093. The reversal of 20252091 is 19025202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20252091 - 2⁶ = 20252027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20252093) 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 7 ways as a sum of consecutive naturals, for example, 30640 + ... + 31293.

It is an arithmetic number, because the mean of its divisors is an integer number (3406370).

Almost surely, 2^20252091 is an apocalyptic number.

20252091 is a deficient number, since it is larger than the sum of its proper divisors (6998869).

20252091 is a wasteful number, since it uses less digits than its factorization.

20252091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62045.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 20252091 is about 4500.2323273360. The cubic root of 20252091 is about 272.5774703282.

Adding to 20252091 its reverse (19025202), we get a palindrome (39277293).

The spelling of 20252091 in words is "twenty million, two hundred fifty-two thousand, ninety-one".