20043280 has 40 divisors (see below), whose sum is σ = 46872000. Its totient is φ = 7970688.

The previous prime is 20043269. The next prime is 20043311. The reversal of 20043280 is 8234002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15291 + ... + 16549.

It is an arithmetic number, because the mean of its divisors is an integer number (1171800).

Almost surely, 2^20043280 is an apocalyptic number.

20043280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20043280 is an abundant number, since it is smaller than the sum of its proper divisors (26828720).

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

20043280 is a wasteful number, since it uses less digits than its factorization.

20043280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471 (or 1465 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20043280 is about 4476.9721911131. The cubic root of 20043280 is about 271.6374205827.

Adding to 20043280 its reverse (8234002), we get a palindrome (28277282).

The spelling of 20043280 in words is "twenty million, forty-three thousand, two hundred eighty".