20646076 has 12 divisors (see below), whose sum is σ = 39415320. Its totient is φ = 9384560.

The previous prime is 20646071. The next prime is 20646089. The reversal of 20646076 is 67064602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20646071) 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, 234571 + ... + 234658.

It is an arithmetic number, because the mean of its divisors is an integer number (3284610).

Almost surely, 2^20646076 is an apocalyptic number.

It is an amenable number.

20646076 is a deficient number, since it is larger than the sum of its proper divisors (18769244).

20646076 is a wasteful number, since it uses less digits than its factorization.

20646076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469244 (or 469242 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 20646076 is about 4543.7953298977. The cubic root of 20646076 is about 274.3337081712. Note that the first 3 decimals are identical.

The spelling of 20646076 in words is "twenty million, six hundred forty-six thousand, seventy-six".