20660046 has 16 divisors (see below), whose sum is σ = 45076608. Its totient is φ = 6260600.

The previous prime is 20659999. The next prime is 20660047. The reversal of 20660046 is 64006602.

It is a junction number, because it is equal to n+sod(n) for n = 20659998 and 20660025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156450 + ... + 156581.

It is an arithmetic number, because the mean of its divisors is an integer number (2817288).

Almost surely, 2^20660046 is an apocalyptic number.

20660046 is an abundant number, since it is smaller than the sum of its proper divisors (24416562).

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

20660046 is a wasteful number, since it uses less digits than its factorization.

20660046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313047.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20660046 is about 4545.3323310843. The cubic root of 20660046 is about 274.3955694474.

Adding to 20660046 its reverse (64006602), we get a palindrome (84666648).

It can be divided in two parts, 20 and 660046, that added together give a palindrome (660066).

The spelling of 20660046 in words is "twenty million, six hundred sixty thousand, forty-six".