20266946 has 8 divisors (see below), whose sum is σ = 34743360. Its totient is φ = 8685828.

The previous prime is 20266927. The next prime is 20266949. The reversal of 20266946 is 64966202.

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 (20266949) 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, 723806 + ... + 723833.

It is an arithmetic number, because the mean of its divisors is an integer number (4342920).

Almost surely, 2^20266946 is an apocalyptic number.

20266946 is a deficient number, since it is larger than the sum of its proper divisors (14476414).

20266946 is a wasteful number, since it uses less digits than its factorization.

20266946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447648.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 20266946 is about 4501.8824951347. The cubic root of 20266946 is about 272.6440996408.

It can be divided in two parts, 20266 and 946, that added together give a palindrome (21212).

The spelling of 20266946 in words is "twenty million, two hundred sixty-six thousand, nine hundred forty-six".