20453151 has 4 divisors (see below), whose sum is σ = 27270872. Its totient is φ = 13635432.

The previous prime is 20453123. The next prime is 20453171. The reversal of 20453151 is 15135402.

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

It is not a de Polignac number, because 20453151 - 2⁹ = 20452639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453171) 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, 3408856 + ... + 3408861.

It is an arithmetic number, because the mean of its divisors is an integer number (6817718).

Almost surely, 2^20453151 is an apocalyptic number.

20453151 is a deficient number, since it is larger than the sum of its proper divisors (6817721).

20453151 is an equidigital number, since it uses as much as digits as its factorization.

20453151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6817720.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 20453151 is about 4522.5160032884. The cubic root of 20453151 is about 273.4765389116.

Adding to 20453151 its reverse (15135402), we get a palindrome (35588553).

The spelling of 20453151 in words is "twenty million, four hundred fifty-three thousand, one hundred fifty-one".