20038540 has 24 divisors (see below), whose sum is σ = 44296560. Its totient is φ = 7593408.

The previous prime is 20038531. The next prime is 20038541. The reversal of 20038540 is 4583002.

It is not an unprimeable number, because it can be changed into a prime (20038541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25987 + ... + 26746.

It is an arithmetic number, because the mean of its divisors is an integer number (1845690).

Almost surely, 2^20038540 is an apocalyptic number.

20038540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20038540 is an abundant number, since it is smaller than the sum of its proper divisors (24258020).

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

20038540 is a wasteful number, since it uses less digits than its factorization.

20038540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52761 (or 52759 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20038540 is about 4476.4427841758. The cubic root of 20038540 is about 271.6160058761.

The spelling of 20038540 in words is "twenty million, thirty-eight thousand, five hundred forty".