20443107 has 32 divisors (see below), whose sum is σ = 29963520. Its totient is φ = 12355200.

The previous prime is 20443097. The next prime is 20443109. The reversal of 20443107 is 70134402.

It is not a de Polignac number, because 20443107 - 2⁴ = 20443091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20443109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202357 + ... + 202457.

It is an arithmetic number, because the mean of its divisors is an integer number (936360).

Almost surely, 2^20443107 is an apocalyptic number.

20443107 is a deficient number, since it is larger than the sum of its proper divisors (9520413).

20443107 is a wasteful number, since it uses less digits than its factorization.

20443107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20443107 is about 4521.4054230958. The cubic root of 20443107 is about 273.4317658901.

Adding to 20443107 its reverse (70134402), we get a palindrome (90577509).

It can be divided in two parts, 2044 and 3107, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 20443107 in words is "twenty million, four hundred forty-three thousand, one hundred seven".