20452145 has 8 divisors (see below), whose sum is σ = 28048704. Its totient is φ = 14024304.

The previous prime is 20452123. The next prime is 20452147. The reversal of 20452145 is 54125402.

It is a happy number.

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

It is not a de Polignac number, because 20452145 - 2¹² = 20448049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20452145.

It is not an unprimeable number, because it can be changed into a prime (20452147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292139 + ... + 292208.

It is an arithmetic number, because the mean of its divisors is an integer number (3506088).

Almost surely, 2^20452145 is an apocalyptic number.

It is an amenable number.

20452145 is a deficient number, since it is larger than the sum of its proper divisors (7596559).

20452145 is an equidigital number, since it uses as much as digits as its factorization.

20452145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584359.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 20452145 is about 4522.4047806449. The cubic root of 20452145 is about 273.4720551377.

Adding to 20452145 its reverse (54125402), we get a palindrome (74577547).

The spelling of 20452145 in words is "twenty million, four hundred fifty-two thousand, one hundred forty-five".