20935930 has 16 divisors (see below), whose sum is σ = 37743264. Its totient is φ = 8361360.

The previous prime is 20935927. The next prime is 20935939. The reversal of 20935930 is 3953902.

It is a junction number, because it is equal to n+sod(n) for n = 20935892 and 20935901.

It is not an unprimeable number, because it can be changed into a prime (20935939) 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 7 ways as a sum of consecutive naturals, for example, 7645 + ... + 10015.

It is an arithmetic number, because the mean of its divisors is an integer number (2358954).

Almost surely, 2^20935930 is an apocalyptic number.

20935930 is a deficient number, since it is larger than the sum of its proper divisors (16807334).

20935930 is a wasteful number, since it uses less digits than its factorization.

20935930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3261.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 20935930 is about 4575.5797446881. The cubic root of 20935930 is about 275.6115536004.

The spelling of 20935930 in words is "twenty million, nine hundred thirty-five thousand, nine hundred thirty".