20863934 has 64 divisors (see below), whose sum is σ = 41126400. Its totient is φ = 7717248.

The previous prime is 20863933. The next prime is 20863939. The reversal of 20863934 is 43936802.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20863894 and 20863903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20863933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 311369 + ... + 311435.

It is an arithmetic number, because the mean of its divisors is an integer number (642600).

Almost surely, 2^20863934 is an apocalyptic number.

20863934 is a deficient number, since it is larger than the sum of its proper divisors (20262466).

20863934 is a wasteful number, since it uses less digits than its factorization.

20863934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 20863934 is about 4567.7055509304. The cubic root of 20863934 is about 275.2952597340.

The spelling of 20863934 in words is "twenty million, eight hundred sixty-three thousand, nine hundred thirty-four".