20688058 has 8 divisors (see below), whose sum is σ = 31056480. Its totient is φ = 10335900.

The previous prime is 20688043. The next prime is 20688071. The reversal of 20688058 is 85088602.

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

It is a super-3 number, since 3×20688058³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 118 + ... + 6433.

It is an arithmetic number, because the mean of its divisors is an integer number (3882060).

Almost surely, 2^20688058 is an apocalyptic number.

20688058 is a deficient number, since it is larger than the sum of its proper divisors (10368422).

20688058 is a wasteful number, since it uses less digits than its factorization.

20688058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8132.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 20688058 is about 4548.4126901591. The cubic root of 20688058 is about 274.5195268584.

The spelling of 20688058 in words is "twenty million, six hundred eighty-eight thousand, fifty-eight".