20683538 has 8 divisors (see below), whose sum is σ = 31155840. Its totient is φ = 10298260.

The previous prime is 20683529. The next prime is 20683547. The reversal of 20683538 is 83538602.

It is an interprime number because it is at equal distance from previous prime (20683529) and next prime (20683547).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20683498 and 20683507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21158 + ... + 22113.

It is an arithmetic number, because the mean of its divisors is an integer number (3894480).

Almost surely, 2^20683538 is an apocalyptic number.

20683538 is a deficient number, since it is larger than the sum of its proper divisors (10472302).

20683538 is a wasteful number, since it uses less digits than its factorization.

20683538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43512.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 20683538 is about 4547.9157863795. The cubic root of 20683538 is about 274.4995327369.

The spelling of 20683538 in words is "twenty million, six hundred eighty-three thousand, five hundred thirty-eight".