20685038 has 8 divisors (see below), whose sum is σ = 33848280. Its totient is φ = 9402280.

The previous prime is 20685019. The next prime is 20685043. The reversal of 20685038 is 83058602.

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

It is a super-2 number, since 2×20685038² = 855741594122888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20684995 and 20685013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470093 + ... + 470136.

It is an arithmetic number, because the mean of its divisors is an integer number (4231035).

Almost surely, 2^20685038 is an apocalyptic number.

20685038 is a deficient number, since it is larger than the sum of its proper divisors (13163242).

20685038 is a wasteful number, since it uses less digits than its factorization.

20685038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940242.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20685038 is about 4548.0806940950. The cubic root of 20685038 is about 274.5061682771.

The spelling of 20685038 in words is "twenty million, six hundred eighty-five thousand, thirty-eight".