20100538 has 8 divisors (see below), whose sum is σ = 31190580. Its totient is φ = 9703680.

The previous prime is 20100529. The next prime is 20100539. The reversal of 20100538 is 83500102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20097289 + 3249 = 4483^2 + 57^2 .

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 (20100539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173223 + ... + 173338.

Almost surely, 2^20100538 is an apocalyptic number.

20100538 is a deficient number, since it is larger than the sum of its proper divisors (11090042).

20100538 is a wasteful number, since it uses less digits than its factorization.

20100538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346592.

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

The square root of 20100538 is about 4483.3623543051. The cubic root of 20100538 is about 271.8958385049.

The spelling of 20100538 in words is "twenty million, one hundred thousand, five hundred thirty-eight".