20738863 has 4 divisors (see below), whose sum is σ = 20878200. Its totient is φ = 20599528.

The previous prime is 20738849. The next prime is 20738903. The reversal of 20738863 is 36883702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36883702 = 2 ⋅18441851.

It is a cyclic number.

It is not a de Polignac number, because 20738863 - 2⁵ = 20738831 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 (20738813) 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, 69445 + ... + 69742.

It is an arithmetic number, because the mean of its divisors is an integer number (5219550).

Almost surely, 2^20738863 is an apocalyptic number.

20738863 is a deficient number, since it is larger than the sum of its proper divisors (139337).

20738863 is a wasteful number, since it uses less digits than its factorization.

20738863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139336.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 20738863 is about 4553.9941809361. The cubic root of 20738863 is about 274.7440616004.

The spelling of 20738863 in words is "twenty million, seven hundred thirty-eight thousand, eight hundred sixty-three".