20647266 has 8 divisors (see below), whose sum is σ = 41294544. Its totient is φ = 6882420.

The previous prime is 20647229. The next prime is 20647273. The reversal of 20647266 is 66274602.

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

20647266 is an admirable 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, 1720600 + ... + 1720611.

It is an arithmetic number, because the mean of its divisors is an integer number (5161818).

Almost surely, 2^20647266 is an apocalyptic number.

20647266 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.

20647266 is a wasteful number, since it uses less digits than its factorization.

20647266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441216.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 20647266 is about 4543.9262758104. The cubic root of 20647266 is about 274.3389787585.

The spelling of 20647266 in words is "twenty million, six hundred forty-seven thousand, two hundred sixty-six".