20443146 has 64 divisors (see below), whose sum is σ = 45619200. Its totient is φ = 6080256.

The previous prime is 20443141. The next prime is 20443201. The reversal of 20443146 is 64134402.

It is not an unprimeable number, because it can be changed into a prime (20443141) 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, 258735 + ... + 258813.

It is an arithmetic number, because the mean of its divisors is an integer number (712800).

Almost surely, 2^20443146 is an apocalyptic number.

20443146 is an abundant number, since it is smaller than the sum of its proper divisors (25176054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20443146 is a wasteful number, since it uses less digits than its factorization.

20443146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20443146 is about 4521.4097359120. The cubic root of 20443146 is about 273.4319397683.

Adding to 20443146 its reverse (64134402), we get a palindrome (84577548).

The spelling of 20443146 in words is "twenty million, four hundred forty-three thousand, one hundred forty-six".