20010538 has 8 divisors (see below), whose sum is σ = 30057732. Its totient is φ = 9991296.

The previous prime is 20010533. The next prime is 20010539. The reversal of 20010538 is 83501002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20007729 + 2809 = 4473^2 + 53^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20010533) 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 3 ways as a sum of consecutive naturals, for example, 5095 + ... + 8122.

Almost surely, 2^20010538 is an apocalyptic number.

20010538 is a deficient number, since it is larger than the sum of its proper divisors (10047194).

20010538 is a wasteful number, since it uses less digits than its factorization.

20010538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13976.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20010538 is about 4473.3139840615. The cubic root of 20010538 is about 271.4894275102.

The spelling of 20010538 in words is "twenty million, ten thousand, five hundred thirty-eight".