20545144 has 16 divisors (see below), whose sum is σ = 38669400. Its totient is φ = 10233312.

The previous prime is 20545127. The next prime is 20545153. The reversal of 20545144 is 44154502.

It is a happy number.

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, 2622 + ... + 6925.

Almost surely, 2^20545144 is an apocalyptic number.

It is an amenable number.

20545144 is a deficient number, since it is larger than the sum of its proper divisors (18124256).

20545144 is a wasteful number, since it uses less digits than its factorization.

20545144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9822 (or 9818 counting only the distinct ones).

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

The square root of 20545144 is about 4532.6751482982. The cubic root of 20545144 is about 273.8859347263.

Adding to 20545144 its reverse (44154502), we get a palindrome (64699646).

The spelling of 20545144 in words is "twenty million, five hundred forty-five thousand, one hundred forty-four".