20660444 has 12 divisors (see below), whose sum is σ = 41320944. Its totient is φ = 8854464.

The previous prime is 20660399. The next prime is 20660473. The reversal of 20660444 is 44406602.

20660444 is an admirable number.

It is a super-3 number, since 3×20660444³ (a number of 23 digits) contains 333 as substring.

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, 368909 + ... + 368964.

It is an arithmetic number, because the mean of its divisors is an integer number (3443412).

Almost surely, 2^20660444 is an apocalyptic number.

It is an amenable number.

20660444 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.

20660444 is a wasteful number, since it uses less digits than its factorization.

20660444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737884 (or 737882 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 20660444 is about 4545.3761120506. The cubic root of 20660444 is about 274.3973314431.

The spelling of 20660444 in words is "twenty million, six hundred sixty thousand, four hundred forty-four".