20789144 has 16 divisors (see below), whose sum is σ = 39715920. Its totient is φ = 10198240.

The previous prime is 20789141. The next prime is 20789179. The reversal of 20789144 is 44198702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20789141) 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, 24092 + ... + 24939.

It is an arithmetic number, because the mean of its divisors is an integer number (2482245).

Almost surely, 2^20789144 is an apocalyptic number.

It is an amenable number.

20789144 is a deficient number, since it is larger than the sum of its proper divisors (18926776).

20789144 is a wasteful number, since it uses less digits than its factorization.

20789144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49090 (or 49086 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 20789144 is about 4559.5113773298. The cubic root of 20789144 is about 274.9659197436.

The spelling of 20789144 in words is "twenty million, seven hundred eighty-nine thousand, one hundred forty-four".