20783166 has 8 divisors (see below), whose sum is σ = 41566344. Its totient is φ = 6927720.

The previous prime is 20783137. The next prime is 20783167. The reversal of 20783166 is 66138702.

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

20783166 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20783167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1731925 + ... + 1731936.

It is an arithmetic number, because the mean of its divisors is an integer number (5195793).

Almost surely, 2^20783166 is an apocalyptic number.

20783166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20783166 is a wasteful number, since it uses less digits than its factorization.

20783166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3463866.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20783166 is about 4558.8557774951. The cubic root of 20783166 is about 274.9395613736.

The spelling of 20783166 in words is "twenty million, seven hundred eighty-three thousand, one hundred sixty-six".