20934686 has 8 divisors (see below), whose sum is σ = 31870920. Its totient is φ = 10311048.

The previous prime is 20934677. The next prime is 20934691. The reversal of 20934686 is 68643902.

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

It is a super-2 number, since 2×20934686² = 876522155837192, which contains 22 as substring.

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, 77981 + ... + 78248.

It is an arithmetic number, because the mean of its divisors is an integer number (3983865).

Almost surely, 2^20934686 is an apocalyptic number.

20934686 is a deficient number, since it is larger than the sum of its proper divisors (10936234).

20934686 is a wasteful number, since it uses less digits than its factorization.

20934686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156298.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 20934686 is about 4575.4438036107. The cubic root of 20934686 is about 275.6060946030.

The spelling of 20934686 in words is "twenty million, nine hundred thirty-four thousand, six hundred eighty-six".