20354331 has 4 divisors (see below), whose sum is σ = 27139112. Its totient is φ = 13569552.

The previous prime is 20354311. The next prime is 20354357. The reversal of 20354331 is 13345302.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20354331 - 2⁷ = 20354203 is a prime.

It is a super-2 number, since 2×20354331² = 828597580915122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20354298 and 20354307.

It is not an unprimeable number, because it can be changed into a prime (20354311) 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 3 ways as a sum of consecutive naturals, for example, 3392386 + ... + 3392391.

It is an arithmetic number, because the mean of its divisors is an integer number (6784778).

Almost surely, 2^20354331 is an apocalyptic number.

20354331 is a deficient number, since it is larger than the sum of its proper divisors (6784781).

20354331 is an equidigital number, since it uses as much as digits as its factorization.

20354331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6784780.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 20354331 is about 4511.5774403195. The cubic root of 20354331 is about 273.0353910296.

Adding to 20354331 its reverse (13345302), we get a palindrome (33699633).

The spelling of 20354331 in words is "twenty million, three hundred fifty-four thousand, three hundred thirty-one".