20443115 has 32 divisors (see below), whose sum is σ = 31656960. Its totient is φ = 12297600.

The previous prime is 20443109. The next prime is 20443123. The reversal of 20443115 is 51134402.

It is not a de Polignac number, because 20443115 - 2¹⁰ = 20442091 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10250 + ... + 12080.

It is an arithmetic number, because the mean of its divisors is an integer number (989280).

Almost surely, 2^20443115 is an apocalyptic number.

20443115 is a deficient number, since it is larger than the sum of its proper divisors (11213845).

20443115 is a wasteful number, since it uses less digits than its factorization.

20443115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20443115 is about 4521.4063077764. The cubic root of 20443115 is about 273.4318015574.

Adding to 20443115 its reverse (51134402), we get a palindrome (71577517).

The spelling of 20443115 in words is "twenty million, four hundred forty-three thousand, one hundred fifteen".