20138063 has 4 divisors (see below), whose sum is σ = 21968808. Its totient is φ = 18307320.

The previous prime is 20138033. The next prime is 20138071. The reversal of 20138063 is 36083102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20138063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20138033) 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, 915356 + ... + 915377.

It is an arithmetic number, because the mean of its divisors is an integer number (5492202).

Almost surely, 2^20138063 is an apocalyptic number.

20138063 is a deficient number, since it is larger than the sum of its proper divisors (1830745).

20138063 is a wasteful number, since it uses less digits than its factorization.

20138063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830744.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20138063 is about 4487.5453201054. The cubic root of 20138063 is about 272.0649309736.

The spelling of 20138063 in words is "twenty million, one hundred thirty-eight thousand, sixty-three".