20554144 has 24 divisors (see below), whose sum is σ = 43579620. Its totient is φ = 9486336.

The previous prime is 20554123. The next prime is 20554151. The reversal of 20554144 is 44145502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19254544 + 1299600 = 4388^2 + 1140^2 .

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, 24289 + ... + 25120.

Almost surely, 2^20554144 is an apocalyptic number.

It is an amenable number.

20554144 is an abundant number, since it is smaller than the sum of its proper divisors (23025476).

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

20554144 is a wasteful number, since it uses less digits than its factorization.

20554144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49432 (or 49424 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 20554144 is about 4533.6678307966. The cubic root of 20554144 is about 273.9259216865.

Adding to 20554144 its reverse (44145502), we get a palindrome (64699646).

The spelling of 20554144 in words is "twenty million, five hundred fifty-four thousand, one hundred forty-four".