20466644 has 12 divisors (see below), whose sum is σ = 39072768. Its totient is φ = 9303000.

The previous prime is 20466643. The next prime is 20466653. The reversal of 20466644 is 44666402.

It is a self number, because there is not a number n which added to its sum of digits gives 20466644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20466643) 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, 232532 + ... + 232619.

It is an arithmetic number, because the mean of its divisors is an integer number (3256064).

Almost surely, 2^20466644 is an apocalyptic number.

It is an amenable number.

20466644 is a deficient number, since it is larger than the sum of its proper divisors (18606124).

20466644 is a wasteful number, since it uses less digits than its factorization.

20466644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465166 (or 465164 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 20466644 is about 4524.0075154668. The cubic root of 20466644 is about 273.5366634338.

It can be divided in two parts, 20 and 466644, that added together give a palindrome (466664).

The spelling of 20466644 in words is "twenty million, four hundred sixty-six thousand, six hundred forty-four".