20146656 has 24 divisors (see below), whose sum is σ = 52885224. Its totient is φ = 6715520.

The previous prime is 20146639. The next prime is 20146681. The reversal of 20146656 is 65664102.

It is a tau number, because it is divible by the number of its divisors (24).

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, 104835 + ... + 105026.

It is an arithmetic number, because the mean of its divisors is an integer number (2203551).

Almost surely, 2^20146656 is an apocalyptic number.

It is an amenable number.

20146656 is an abundant number, since it is smaller than the sum of its proper divisors (32738568).

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

20146656 is a wasteful number, since it uses less digits than its factorization.

20146656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209874 (or 209866 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20146656 is about 4488.5026456492. The cubic root of 20146656 is about 272.1036225714.

It can be divided in two parts, 20146 and 656, that added together give a palindrome (20802).

The spelling of 20146656 in words is "twenty million, one hundred forty-six thousand, six hundred fifty-six".