20786146 has 8 divisors (see below), whose sum is σ = 31265280. Its totient is φ = 10364388.

The previous prime is 20786137. The next prime is 20786149. The reversal of 20786146 is 64168702.

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

It is not an unprimeable number, because it can be changed into a prime (20786149) 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, 13426 + ... + 14893.

It is an arithmetic number, because the mean of its divisors is an integer number (3908160).

Almost surely, 2^20786146 is an apocalyptic number.

20786146 is a deficient number, since it is larger than the sum of its proper divisors (10479134).

20786146 is a wasteful number, since it uses less digits than its factorization.

20786146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28688.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20786146 is about 4559.1826021777. The cubic root of 20786146 is about 274.9527015073.

The spelling of 20786146 in words is "twenty million, seven hundred eighty-six thousand, one hundred forty-six".